CN1010738B - Minitype portable x-ray machine - Google Patents
Minitype portable x-ray machineInfo
- Publication number
- CN1010738B CN1010738B CN 87104542 CN87104542A CN1010738B CN 1010738 B CN1010738 B CN 1010738B CN 87104542 CN87104542 CN 87104542 CN 87104542 A CN87104542 A CN 87104542A CN 1010738 B CN1010738 B CN 1010738B
- Authority
- CN
- China
- Prior art keywords
- mentioned
- insulating sleeve
- horizontal beam
- beam assembly
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000009413 insulation Methods 0.000 claims description 27
- 229910001220 stainless steel Inorganic materials 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 239000003921 oil Substances 0.000 claims 3
- 239000007787 solid Substances 0.000 claims 2
- 235000011837 pasties Nutrition 0.000 claims 1
- 230000002285 radioactive effect Effects 0.000 abstract description 9
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 239000003822 epoxy resin Substances 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 239000000941 radioactive substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- XMBWDFGMSWQBCA-RNFDNDRNSA-M iodine-131(1-) Chemical compound [131I-] XMBWDFGMSWQBCA-RNFDNDRNSA-M 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 241000406668 Loxodonta cyclotis Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Images
Landscapes
- X-Ray Techniques (AREA)
Abstract
The present invention relates to a miniature portable X-ray apparatus which is composed of an X-ray device 1, a cross beam assembly 2, a handle assembly 3, a cassette seat assembly 4 and a control box 5, wherein a miniature X-ray tube with low power and micro focus is used as a radioactive source of the X-ray apparatus 1, and a non-oil heat dissipation insulating medium is adopted, so the X-ray apparatus has the advantages of small size (phi 40*240mm), high weight (0.8kg) and no leakage at the inoperative time. The miniature portable X-ray apparatus of the present invention obtains high-quality skiagrams in a short source-skiagram distance, is suitable for the application to operating rooms and emergency rooms in hospitals and field conditions, and is a good supplementary product for a large-scale X-ray apparatus.
Description
The present invention relates to a kind of X line machine, specifically relate to a kind of with the X spool be radioactive source, capable of taking pictures, volume is little, X line machine in light weight, portable.
As everyone knows, X line machine is a difference of utilizing the X line absorption that checked object gives off X line source in the machine, forms video on the receiver resembling, and checked object is checked.
Phenomenon be the X line machine of radioactive source with the X spool owing to require the power of X line source big,, make complex structure for satisfying its heat radiation and insulating requirements, volume and weight all is difficult to reach the requirement of " portable ".Existing is the X line machine of X line source with the radioactive substance, can satisfy the requirement of " portable ", but has brought some insoluble problems; Radiation leakage when not working, the trouble and the expense of radioactive substance periodic replacement are higher, and these have all influenced its practical value greatly.
In some cases, for example, all need a kind of portable X line machine to the emergency ward of the outlying district that lacks enough Medical Devices, battlefield, sports ground, big city hospital, operating room, private clinic etc.
Once the someone proposed the improvement structure of X line source in the past.For example, in No. 4418421 patent of invention of the U.S. that is entitled as " X-ray apparatus " of approval on November 29 nineteen eighty-three, the device that produces the X line is made up of high-voltage generator and x-ray generator two parts, connects with special contact assembly between the two.For solving the cooling problem of x-ray generator anode, that this invention being provided with is used to dispel the heat, as to be with fan aerial cooler.This invention also is arranged on the filament supply transformer in the x-ray generator.The complex structure of this Roentgen apparatus, volume, weight are still bigger, so be difficult to use on " portable " formula X line machine.For another example, in the U.S. the 4th that is entitled as " low-intensity X line and r line image device ", 142, in No. 101 patents of invention, the X line source is an elemental radioiodine 125, resembling receiving device resembles the conversion screen that is transformed into the visible light elephant and one two generation by a slice with X line or r line and closely pastes that the visible light casting image intensifier forms, resembling on the human eye scioptics observation casting image intensifier phosphor screen.Although the X line machine of this invention can satisfy the requirement of " portable ", owing to adopt elemental radioiodine 125 as radioactive source, the trouble of radiation leakage when just inevitable X line source is not worked and periodic replacement radioactive source, its expense is also higher.In addition, the dosage of this radioactive source radiation is extremely low, though be after thousands of casting image intensifier strengthens, to become visible image can the X line is resembled by luminance gain, but be difficult to make the light reaching the film of X line, thereby the described device of this invention do not have the function of the needed shooting of orthopaedics X exograph X.
The root problem of X line machine miniaturization is to adopt low power X spool, because can reduce the tube current of X spool thus greatly, thereby reduces caloric value greatly, solve since heat radiation bring make a series of problems such as Roentgen apparatus complex structure, weight increase.
An object of the present invention is to provide a kind of X line machine, this X line machine is simple in structure, reliable, in light weight, easy to carry, and radiationless line leaks when not working, and need not to regularly replace X line source (promptly not using radioactive substance as the X line source).
Another object of the present invention provides a kind of X line machine of taking the high-quality X-ray film.This X line machine can use ordinary x-ray film, also can use ripple to draw (Polaroid) imaging sheet; When using an imaging sheet, can be at brightroom operation, and imaging immediately, thereby further eliminated traditional X-ray line machine to darkroom, large-scale dependence of developing and printing equipment, make X line machine of the present invention have more the practical function of " portable ".
It is the Roentgen apparatus of radioactive source with the X spool that a further object of the present invention provides a kind of.This Roentgen apparatus is simple in structure, and volume, weight are much smaller than any existing Roentgen apparatus.
Portable X-ray machine of the present invention comprises: Roentgen apparatus, horizontal Beam assembly, cassette seat assembly, Handleset and control cabinet.
Roentgen apparatus has first insulating sleeve cylindraceous of a both ends open.Be equipped with in first insulating sleeve produce high-tension high-voltage generator and with the be electrically connected miniature x-ray tube of small-power, little focus of high-voltage generator output, spatially they separate by the cylindrical insulation nut of a band screw.In the screw of insulation nut, a metal screw is arranged, be used on electric, the output of high-voltage generator and the anode of X spool being connected.In first insulating sleeve of installing high-voltage generator one side, use the epoxy resin embedding; And between the X of the opposite side spool and the first insulating sleeve inwall, be full of heat radiation, dielectric.The first insulating sleeve outer felt is pressed insulation film around being no less than 3 floor heights, and insulation film is with second insulating sleeve of a cylindric both ends open outward.One one end sealing is arranged and the unlimited cylindric lead of the other end in second insulating sleeve outside, its axial length is shorter than second insulating sleeve.One rectangular window is arranged on this lead.Pad is with insulation spacer on lead blind end inwall.Be with a stainless steel casing with rectangular window outside lead, the rectangular window on its rectangular window and the above-mentioned lead aligns.
The wire harness limiter that changes the X field of line is equipped with at rectangular window place on the stainless steel casing of Roentgen apparatus, by the push-pull button of this limiter, can select and is used for the primary importance that full width takes pictures and is used for the second place that half range is taken pictures.All available spring in each position and steel ball location.The square horn mouth is housed on the wire harness limiter, and the aluminum filtering plate is equipped with in the horn mouth bottom, and a rhomboid contiguous block is equipped with in the same side of installing wire harness limiter on this stainless steel casing, and two coaxial screws are arranged on the contiguous block.
Horizontal Beam assembly is to be made by the metal pipe material in rectangle cross section, on the distolateral wall of one coaxial two through hole is arranged, two screws are through these two through holes, be screwed into from this end and insert the screw of contiguous block of Roentgen apparatus of horizontal Beam assembly inner chamber, horizontal Beam assembly and Roentgen apparatus are coupled together, utilize the gap between horizontal Beam assembly inner chamber and the contiguous block, horizontal Beam assembly can above-mentioned two screws be the relative rotation of axle with Roentgen apparatus, to adjust the position of the relative cassette seat assembly of the X field of line, adjust the back with making tight screw.
The other end of horizontal Beam assembly has a dovetail, and sensitive switch is housed on the dovetail.When dovetail was seated and lock, the sensitive switch normal opened contact was connected at cassette seat assembly and horizontal Beam assembly, and X line machine can be worked.On another side relative on the horizontal Beam assembly with dovetail, a socket is housed, control cabinet is electrically connected with this socket by private cable.
There is a screw at horizontal Beam assembly middle part, is used for connecting with Handleset.
Have leading of an installing magazine poor poor with the dovetail that is used for being connected with horizontal Beam assembly on the cassette seat assembly, on dovetail is poor a cam that connects together with set lever is arranged, rotating this handle can be locked in the cassette seat assembly on the horizontal Beam assembly.
The present invention adopted with existing be the diverse structure of Roentgen apparatus of radioactive source with the X spool, make Roentgen apparatus of the present invention can use the X spool to be radioactive source, when not working, there is not leakage, can clap X-ray film, and volume has only φ 40 * 240mm, weight has only 0.8kg, and the feasible X line facility of being made by it have the characteristics of " portable ".
The present invention has adopted special small-power, the miniature x-ray tube of little focus, makes X line machine can take high-quality X-ray film on extremely short source-sheet distance.
Feature of the present invention and advantage will more fully be described in the most preferred embodiment below.
For a more complete understanding of the present invention, can be with reference to the accompanying drawings, in the accompanying drawings:
Fig. 1 is the front view of several sections of the present invention when fitting together.
Figure 1A is the drawing in side sectional elevation of being got along A-A line among Fig. 1.
Figure 1B is the drawing in side sectional elevation of being got along B-B line among Fig. 1.
Fig. 1 C is the amplification sectional arrangement drawing of I part among Fig. 1.
Fig. 1 D is the sectional arrangement drawing of the Roentgen apparatus of X line machine of the present invention, represents the internal structure of this device.
Fig. 1 E is the amplification sectional arrangement drawing of II part among Fig. 1.
Fig. 2 is the partial top view after the wire harness limiter among Fig. 1 D removes horn mouth, has part to be broken away.
With reference to figure 1, there is shown the situation that the Roentgen apparatus 1 of X line machine of the present invention, horizontal Beam assembly 2, Handleset 3, cassette seat assembly 4 and control cabinet 5 fit together.Wherein, horizontal Beam assembly 2 is the bending parts that are welded into by two sections metal side tubes, the one end connects with Roentgen apparatus 1 by contiguous block 19 by two screws among Figure 1B 47, when unclamping screw 47, gap by the inner chamber and the contiguous block 19 of horizontal Beam assembly 2, Roentgen apparatus 1 can serve as that axle rotates slightly with screw 47, to adjust the position of the X field of line with respect to magazine assembly 4, after the position mixes up, tighten screw 47, and tighten clamping screw 48, the Roentgen apparatus 1 and the relative position of horizontal Beam assembly 2 are fixed, shown in Figure 1B.
A connecting plate 73 of being with internal thread through hole is equipped with at the middle part of horizontal Beam assembly 2 among Fig. 1, and shown in Fig. 1 E, the screw portion of the handwheel 63 on the Handleset 3 can be screwed in these connecting plate 73 tapped through holes, and Handleset 3 and horizontal Beam assembly 2 are assembled together.The two side that the part of handwheel 63 band rollers flower is protruded Handleset 3, rotating this handwheel 63 can dismounting Handleset 3, if remove Handleset 3, can also X line machine be fixed on the general tripod for camera by tapped through hole on the connecting plate 73.
On the same sidewall of the other end of horizontal Beam assembly 2 and assembling Handleset 3, a socket 55 is housed, shown in Fig. 1 C, be used for being connected with the private cable of control box 5.On the side relative, dovetail 58 is housed, is used for being connected, shown in Figure 1A and 1C, with screw 75 end cap 53 and horizontal Beam assembly 2 are connected together, and the end of horizontal Beam assembly 2 is covered with cassette seat assembly 4 with the side of mounting receptacle 55.
Referring to Fig. 1 C, in the cavity of the horizontal Beam 68 of square tube type, screw 59 is connected fixed head 84 with dovetail 58, and with screw 74 dovetail 58 is fixed on the horizontal Beam 68.With the through hole of screw 57 sensitive switch 69 is fixed on the connecting plate 54 by pressing plate 56, the slide block 44 that is contained in dovetail 58 slotted holes is movable up and down, when cassette seat assembly 4 is contained on the horizontal Beam assembly 2, the dovetail 58 and the poor 43(of dovetail that are them see Figure 1A) cooperate when putting in place, be rotated counterclockwise set lever 46(and see Fig. 1), just cassette seat assembly 4 is locked with the cam 83 that set lever 46 links together, simultaneously slide block 44 is depressed, slide block 44 touches sensitive switch 69, and the normal opened contact of switch 69 is just connected X line machine control circuit.
Can install ordinary x-ray film 8 * 10 " magazine or polaroid film 8 * 10 " magazine in the magazine of cassette seat assembly 4 poor 49, the magazine that film will be housed before taking pictures is inserted in this magazine poor 49, as shown in Figure 1.
Referring to Fig. 1 D, the miniature x-ray tube 9 that produces high-tension high-voltage generator 41 and be electrically connected with high-voltage generator 41 outputs is equipped with in Roentgen apparatus 1 inside that the present invention produces the X line, they all are contained in epoxy resin first insulating sleeve 27 cylindraceous, and the two is spatially separated by columned insulation nut 33.The cylindrical side of insulation nut 33 fixes on shell 27 inwalls with epoxy resin is sticking, on the insulation nut 33 a tapped through hole is arranged, the central axes of this through hole central axis and insulation nut 33.Be screwed into screw rod 32 from high pressure generator one side in this through hole, screw rod 32 stretches out from the opposite side of insulation nut 33, and the socket cap of screw rod 32 partly sinks in the insulation nut 33.
Miniature x-ray tube 9 is mechanically anchored on the above-mentioned screw rod 32 by the screw on the anode 64.At X spool 9 cathode terminals two filament exits 38 are arranged, be welded with the thin copper belt with the insulating tape parcel on the exit, two thin copper belts are drawn through the hole 66 on the sidewall of installing high-voltage generator one side on the stainless steel casing along the second insulating sleeve side.
High-voltage generator 41 is formed by high-tension transformer 25 with by the voltage doubling rectifing circuit assembly that capacitor 28, diode 29 are formed, and the output of voltage doubling rectifing circuit assembly is welded on the socket cap of screw rod 32.The secondary coil 22 of high-tension transformer 25 links to each other with voltage doubling rectifing circuit assembly input, the lead of its primary coil 26 usefulness tape insulations is connected on the socket 18 by the hole on the stainless steel casing 66, this socket 18 links to each other high-tension transformer 25 and voltage doubling rectifing circuit assembly along the installing of the axis of first insulating sleeve by lead with socket 55, and with epoxy resin 30 embeddings.
With three-layer insulated at least film 42, outside insulation film, put second insulating sleeve 31 in the above-mentioned first insulating sleeve outer felt.Between each layer insulation film, between insulation film and above-mentioned first insulating sleeve, between insulation film and above-mentioned second insulating sleeve and between the above-mentioned miniature x-ray tube and first insulating sleeve, all be full of silicones 8.
That side that X spool 9 is housed at second insulating sleeve is with end sealing cylindraceous and the unlimited lead 6 of the other end, and its axial length exceeds insulation nut 33, extends in installing high-voltage generator 41 those segment limits always.On lead blind end inwall, pad is with insulation spacer 7, and the rectangular window 82 of lead aligns with the anode of X spool.Be with stainless steel casing 17 cylindraceous in lead 6 outsides, this shell is provided with rectangular window 65, and rectangular window 82 aligns on this window 65 and the lead.At the two ends of stainless steel casing 17 setting-in upper end cover 40 and 23.Between end cap 40 and lead 6, be provided with pad 39, pad 24 is housed between end cap 23 and the high voltage transformer.Hole 66 on stainless steel casing 17 and above-mentioned rectangular window 65 are on the same side.Contiguous block 19 is fixed on stainless steel casing 17 outsides by means of screw 21 and nut 20.Being connected to the thin copper belt of miniature x-ray tube 9 filaments and the lead of the tape insulation layer that is connected to the high-tension transformer primary coil is passed through by the through holes 66 in the middle of the contiguous block 19.
Outside the rectangular window 65 of stainless steel casing 17, wire harness limiter 85 is housed, wire harness limiter seat 15 is fixed on the shell 17 by two screws 16.The horn mouth 10 of square-section is fixed on the wire harness limiter seat 15 by two screws 13, in horn mouth 10 bottoms, is stained with one and filters aluminium sheet 11.
Wire harness limiter seat 15 inboards, be provided with moveable window 14, one of setting-in can block the stereotype 12 of a half window 82 areas on the movable window 14,37(sees Fig. 2 with push-pull button) push installing X spool one side of stainless steel casing 17 to, it is the second place, stereotype 12 on the movable window 14 blocks half of rectangular window 82 areas on the lead, can do half range and take pictures; On the contrary, push push-pull button 37 installing high pressure generator one side of stainless steel casing to, i.e. primary importance, lead rectangular window 82 is not stopped by stereotype on the active window 12, at this moment can do full width and take pictures.Movable window 14 is by the recessed poor location of steel ball 34 and spring 35 and wire harness limiter seat 15 madial walls, as shown in Figure 2.
Control cabinet 5 is seen Fig. 1 through cable and socket 55() two groups of power supplys of input, one group of power supply is supplied with the primary coil 26 of the high-tension transformer 25 of Roentgen apparatus 1, and the voltage of its secondary coil 22 outputs is added on the miniature x-ray tube anode 64 through voltage multiplying rectifier; Another group power supply is linked cathode filament exit 38, supplies with filament voltage.
Operating personnel as required, on control box 5, set the technical factor (tube voltage, tube current, photo opporunity) of taking pictures, and the selected breadth of taking pictures on the wire harness limiter 85 of Roentgen apparatus, the magazine that installs egative film is inserted on the cassette seat assembly 4, again checked object is placed on the magazine, press the trigger switch on the control box 5, promptly finish the process of taking pictures.
Claims (3)
1, a kind of minitype portable X-ray machine, it comprises a Roentgen apparatus, a transverse beam assembly, a Handleset, a cassette seat assembly and a control cabinet, above-mentioned Roentgen apparatus comprises miniature x-ray tube and high-voltage generator of a small-power, little focus, and this X line machine is characterised in that:
A. above-mentioned Roentgen apparatus has first insulating sleeve cylindraceous of a both ends open, wrap in this first insulating sleeve outer be no less than three layers insulation film, second insulating sleeve cylindraceous that is enclosed within the outer both ends open of this insulation film, one is enclosed within the outer end sealing of this second insulating sleeve and the unlimited cylindric lead of the other end, one is enclosed within this lead outward with above-mentioned first insulating sleeve, the stainless steel casing that second insulating sleeve and lead encapsulate, insulation nut by a cylindric band screw between high-tension high-voltage generator of installing in first insulating sleeve of above-mentioned generation and the miniature x-ray tube spatially separates, in the screw of this insulation nut, be equiped with the metal screw that is used to connect above-mentioned high pressure generator output and above-mentioned miniature x-ray tube anode, have non-oils radiating insulating medium around the above-mentioned miniature x-ray tube;
B. in installing X spool one side of the stainless steel casing of above-mentioned Roentgen apparatus, a wire harness limiter that can change the X field of line is arranged, this wire harness limiter can change the X field of line, has the second place that primary importance that full width takes pictures and half range are taken pictures;
C. above-mentioned horizontal Beam assembly one end is connected with above-mentioned Roentgen apparatus by a pair of coaxial screw, and is close to its relative position of solid screw;
D. above-mentioned horizontal Beam assembly middle part by the screw rod of the handwheel of the band roller flower of above-mentioned Handleset, connects this two assembly or takes apart;
The other end of e. above-mentioned horizontal Beam assembly is provided with a dovetail, and the dovetail groove of this dovetail and above-mentioned cassette seat assembly makes horizontal Beam assembly constitute dismountable the connection with the cassette seat inter-module;
F. above-mentioned cassette seat assembly has the guide groove of a loaded cassette, a dovetail groove and a cam of deciding handle with lock that locks above-mentioned horizontal Beam assembly and cassette seat assembly relative position that is connected usefulness with horizontal Beam assembly.
2, according to the X line machine of claim 1, it is characterized in that: first insulating sleeve, insulation film and second insulating sleeve that above-mentioned non-oils heat radiation, dielectric comprise solid.
3, according to the X line machine of claim 1, it is characterized in that: above-mentioned non-oils heat radiation, dielectric are included between the X spool and first insulating sleeve, between first insulating sleeve and insulation film, between each layer insulation film, the silicones of the pasty state that is full of between insulation film and second insulating sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104542 CN1010738B (en) | 1987-06-30 | 1987-06-30 | Minitype portable x-ray machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87104542 CN1010738B (en) | 1987-06-30 | 1987-06-30 | Minitype portable x-ray machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1030509A CN1030509A (en) | 1989-01-18 |
| CN1010738B true CN1010738B (en) | 1990-12-05 |
Family
ID=4814922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87104542 Expired CN1010738B (en) | 1987-06-30 | 1987-06-30 | Minitype portable x-ray machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1010738B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004177251A (en) * | 2002-11-27 | 2004-06-24 | Canon Inc | Radiation imaging equipment |
| JP5984432B2 (en) * | 2012-03-01 | 2016-09-06 | キヤノン株式会社 | X-ray equipment |
| CN108964420A (en) * | 2018-06-21 | 2018-12-07 | 西安理工大学 | A kind of solid encapsulation structure of X-ray high voltage power supply high-voltage output circuit |
| CN112858350A (en) * | 2019-11-12 | 2021-05-28 | 山西戴德测控技术有限公司 | Portable microfocus X-ray aramid fiber conveyer belt detection device |
| CN111730701B (en) * | 2020-08-20 | 2022-03-04 | 张家界市军声砂石画研究院 | Method for manufacturing mortise and tenon drawing board by adopting traditional log sawing machine to process dovetail mortise and tenon rod |
-
1987
- 1987-06-30 CN CN 87104542 patent/CN1010738B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1030509A (en) | 1989-01-18 |
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