CN106246976B - A kind of meltable bar - Google Patents
A kind of meltable bar Download PDFInfo
- Publication number
- CN106246976B CN106246976B CN201610853460.8A CN201610853460A CN106246976B CN 106246976 B CN106246976 B CN 106246976B CN 201610853460 A CN201610853460 A CN 201610853460A CN 106246976 B CN106246976 B CN 106246976B
- Authority
- CN
- China
- Prior art keywords
- heat build
- fusible member
- meltable
- width
- seat
- Prior art date
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Links
- 238000010586 diagram Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 239000003063 flame retardant Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
- F16K17/406—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint the fracturing member being a generally elongated member, e.g. rod or wire, which is directly connected to a movable valve member, the breaking or buckling of the elongated member allowing the valve member to move to a closed or open position
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Seats For Vehicles (AREA)
- Air-Flow Control Members (AREA)
Abstract
A kind of meltable bar, including the seat that fuses, fusing seat inner sleeve is installed with core bar, and one end of core bar is equipped with heat build-up part, and fusing seat is equipped with connection sheet, fusible member is equipped between connection sheet and heat build-up part, the both ends of fusible member are connected respectively with heat build-up part and connection sheet；It is equipped with heat build-up chamber between heat build-up part and fusible member, the width of heat build-up part is more than the width of fusible member, and the both sides of heat build-up part are equipped with that by the heat build-up gap of air flow guiding to heat build-up intracavitary, outlet deflector hole is additionally provided on heat build-up part respectively between fusible member.By setting heat build-up part, and the width of heat build-up part is set greater than to the width of fusible member, heat build-up gap is set respectively between the both sides of heat build-up part and fusible member simultaneously, so, air flow guiding to heat build-up intracavitary, the air-flow of heat build-up intracavitary can heat the back side of fusible member so that as the fusible member front of windward side and the fusible member back side as leeward can heated fast heat up, and with being consistent by the temperature in pipeline, and can fuse in time.
Description
Technical field
The present invention relates to a kind of meltable guard members, are specifically a kind of meltable bar.
Background technology
As shown in Figure 1, for a kind of existing structure diagram of meltable bar.The meltable bar includes fusing seat 1, the fusing
1 inner sleeve of seat is installed with the core bar being slidably matched with it, and one end of the core bar is equipped with support plate 2, on the fusing seat 1 with it is described
Support plate 2 is correspondingly provided with connection sheet 3, and fuse sheet 4, the both ends of the fuse sheet 4 are equipped between the support plate 2 and connection sheet 3
It is connected respectively by screw with the support plate 2 and connection sheet 3, the other end of the core bar is stretched out outside the fusing seat and is set with
Equipped with the nut being threadedly coupled with fusing seat 1, and it is equipped with and is sleeved on core bar and for driving core bar direction in the fusing seat 1
The spring of end movement where the support plate.Although existing meltable bar disclosure satisfy that requirement to a certain extent,
Often there are problems that fuse sheet can not be blown under the conditions of set temperature in use, i.e., there are fuse sheet fusing to deposit
Lag the long period the problem of.
Since meltable bar is often used in the fire-fighting equipments such as fire resisting damper, if fuse sheet 4 can not fuse in time, people's
Lives and properties are on the hazard, meanwhile, the temperature at the scene such as fire increases rapidly, and the fusing lag of fuse sheet 4 causes fire resisting damper necessary
It could be closed at higher temperature, and due to the effect of expanding with heat and contract with cold caused by high temperature, fire resisting damper is at high temperature due to deformation
It acts on and can not be closed completely, that is, there is a situation where leakage, in this way, leading to defective valve of preventing fires, fireproof technology can not be played
Purpose.
Invention content
It is found by a large number of experiments analysis, since support plate only plays support connection function, it is wide that width is equal to fuse sheet
Degree even it is more narrower than fuse sheet width, when air-flow by when, fuse sheet be used as windward side, front directly be heated, and due to prop up
The narrower width of fagging, around fuse sheet air-flow it is most of directly from the both sides of support plate by cannot be introduced into support plate
Between fuse sheet, i.e., the back side of fuse sheet can not be brought rapidly up, and then it is relatively slow that fuse sheet is caused integrally to heat up, and causes meltable
Piece fusing lag.
In view of this, the purpose of the present invention is to provide a kind of meltable bars, it can be ensured that fuse sheet thermally equivalent is simultaneously rapid
Fusing.
In order to achieve the above objectives, the present invention provides following technical solution：
A kind of meltable bar, including the seat that fuses, the fusing seat inner sleeve is installed with the core bar being slidably matched with it, the core bar
One end be equipped with heat build-up part, be correspondingly provided with connection sheet with the heat build-up part on the fusing seat, the connection sheet and the heat build-up
Fusible member is equipped between part, the both ends of the fusible member are connected respectively with the heat build-up part and the connection sheet；
Heat build-up chamber is equipped between the heat build-up part and the fusible member, the width of the heat build-up part is more than the fusible member
Width, and the both sides of the heat build-up part are equipped between the fusible member for by air flow guiding to the heat build-up intracavitary respectively
Heat build-up gap is additionally provided at least one outlet deflector hole on the heat build-up part.
Further, the heat build-up part uses the shroud-like structure towards the fusible member one end open, the width of the opening
More than the width of the fusible member.
Further, the heat build-up part is domed.
Further, the heat build-up part includes segmental arc, and the both sides of the segmental arc are respectively symmetrically equipped with what is opened to both sides
Drainage plate.
Further, the fusible member is located within the opening of the heat build-up part.
Further, the distance of heat build-up part one end far from the fusing seat to the fusing seat is more than the fusible member
One end far from the fusing seat is to described the distance between seat of fusing.
Further, the fusible member uses fuse sheet or meltable column.
Further, the fusible member uses fuse sheet, and the fuse sheet includes fuse sheet ontology, the fuse sheet ontology
Windward side be equipped with indent heat build-up chamber, and the heat build-up intracavitary be equipped with for air-flow by conduction hole.
Further, the fusible member is domed, and the recessed area of the arch fuse sheet ontology forms the heat build-up chamber.
Further, the minimum widith in the heat build-up gap is more than or equal to 1mm.
The beneficial effects of the present invention are：
The width of heat build-up part by setting heat build-up part, and is set greater than the width of fusible member by the meltable bar of the present invention,
Simultaneously heat build-up gap is set respectively between the both sides of heat build-up part and fusible member, in this way, can by air flow guiding to heat build-up intracavitary,
The air-flow of heat build-up intracavitary can heat the back side of fusible member so that as the fusible member front of windward side and as the easy of leeward
The molten part back side can heated fast heating, with being consistent by temperature in pipeline, and can fuse in time；Due to fusible member
Fusing in time, the temperature at fire resisting damper is also within controllable be divided at this time, therefore the heat expansion deformation of fire resisting damper is smaller, it can be achieved that closing
It closes, it is ensured that fire resisting damper can play the fire-retardant technical purpose of fire insulation.
Description of the drawings
In order to make the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is a kind of existing structure diagram of meltable bar；
Fig. 2 is the A-A sectional views of Fig. 1；
Fig. 3 is the structure diagram of the meltable bar embodiment 1 of the present invention；
Fig. 4 is the B-B sectional views of Fig. 3；
Fig. 5 is the structure diagram of the meltable bar embodiment 2 of the present invention；
Fig. 6 is the structure diagram of fusible member embodiment 3 of the present invention.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments, so that those skilled in the art can be with
It is better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1
As shown in figure 3, the structure diagram for the meltable bar embodiment 1 of the present invention.The meltable bar of the present embodiment, including fusing
Seat 1, fusing 1 inner sleeve of seat are installed with the core bar being slidably matched with it, and one end of core bar is equipped with heat build-up part 5, on the seat 1 that fuses with heat build-up
Part 5 is correspondingly provided with connection sheet 3, is equipped with fusible member 6 between connection sheet 3 and heat build-up part 5, the both ends of fusible member 6 respectively with heat build-up part 5
It is connected with connection sheet 3.Heat build-up chamber 7 is equipped between the heat build-up part 5 of the present embodiment and fusible member 6, the width of heat build-up part 5 is more than meltable
The width of part 6, and the both sides of heat build-up part 5 are equipped between fusible member 6 for by the heat build-up in air flow guiding to heat build-up chamber 7 respectively
Gap 8 is additionally provided with airflow hole 9 on heat build-up part 5.The fusible member 6 of the present embodiment uses fuse sheet.The minimum widith in heat build-up gap 8
More than or equal to 1mm, the minimum widith in the heat build-up gap 8 of the present embodiment is 5mm, and certainly, the minimum widith in heat build-up gap 8 can basis
Actual conditions are set, and such as using 2-4mm or 6mm or more than 6mm, principle is suitable, is not repeated.
Further, heat build-up part 5 is more than institute using the shroud-like structure towards 6 one end open of fusible member, the width of the opening
The width of fusible member 6 is stated, and fusible member 6 is located within the opening of the heat build-up part 5.The heat build-up part 5 of the present embodiment is domed, easily
Molten part 6 is located in the arch area that heat build-up part 5 is formed, and can effectively improve the technology effect to 6 back side efficiency of heating surface of fusible member
Fruit, certainly, as needed, fusible member can also be arranged on other than the opening of heat build-up part 5, that is, is arranged on outside arch area.
Further, it is remote to be more than fusible member 6 for the distance of the heat build-up part 5 of the present embodiment one end far from fusing seat 1 to fusing seat 1
One end from fusing seat 1 is to the distance between the seat 1 that fuses, in this way, top of the air-flow to fusible member 6 can be guided at the top of heat build-up part
End is heated, and improves the being heated evenly property of fusible member 6.
The width of heat build-up part by setting heat build-up part, and is set greater than the width of fusible member by the meltable bar of the present embodiment
Degree, while heat build-up gap is set respectively between the both sides of heat build-up part and fusible member, in this way, can be by air flow guiding to heat build-up chamber
Interior, the air-flow of heat build-up intracavitary can heat the back side of fusible member so that as the fusible member front of windward side and as leeward
The fusible member back side can heated fast heating, with being consistent by temperature in pipeline, and can fuse in time；Due to easy
Molten part fuses in time, at this time the temperature at fire resisting damper also within controllable be divided into, therefore fire resisting damper heat expansion deformation it is smaller, it can be achieved that
It is closed, it is ensured that fire resisting damper can play the fire-retardant technical purpose of fire insulation.
Embodiment 2
As shown in figure 5, the structure diagram for the meltable bar embodiment 2 of the present invention.The meltable bar of the present embodiment, including fusing
Seat 1, fusing 1 inner sleeve of seat are installed with the core bar being slidably matched with it, and one end of core bar is equipped with heat build-up part 5, on the seat 1 that fuses with heat build-up
Part 5 is correspondingly provided with connection sheet 3, is equipped with fusible member 6 between connection sheet 3 and heat build-up part 5, the both ends of fusible member 6 respectively with heat build-up part 5
It is connected with connection sheet 3.Heat build-up chamber 7 is equipped between the heat build-up part 5 of the present embodiment and fusible member 6, the width of heat build-up part 5 is more than meltable
The width of part 6, and the both sides of heat build-up part 5 are equipped between fusible member 6 for by the heat build-up in air flow guiding to heat build-up chamber 7 respectively
Gap 8 is additionally provided with outlet deflector hole 9 on heat build-up part 5.The fusible member 6 of the present embodiment uses meltable column.
Further, heat build-up part 5 is more than institute using the shroud-like structure towards 6 one end open of fusible member, the width of the opening
The width of fusible member 6 is stated, and fusible member 6 is located within the opening of the heat build-up part 5.The heat build-up part 5 of the present embodiment includes arc
The both sides of section 5a, segmental arc 5a are respectively symmetrically equipped with the drainage plate 5b opened to both sides, and fusible member 6 is arranged on two pieces of drainage plate 5b
Between, outlet deflector hole 9 is arranged on segmental arc 5a, by setting drainage plate 5b, can more air-flows be drained to heat build-up chamber 7
It is interior, improve thermal efficiency.
The other structures of the present embodiment are same as Example 1, are not repeated.
The width of heat build-up part by setting heat build-up part, and is set greater than the width of fusible member by the meltable bar of the present embodiment
Degree, while heat build-up gap is set respectively between the both sides of heat build-up part and fusible member, in this way, can be by air flow guiding to heat build-up chamber
Interior, the air-flow of heat build-up intracavitary can heat the back side of fusible member so that as the fusible member front of windward side and as leeward
The fusible member back side can heated fast heating, with being consistent by temperature in pipeline, and can fuse in time；Due to easy
Molten part fuses in time, at this time the temperature at fire resisting damper also within controllable be divided into, therefore fire resisting damper heat expansion deformation it is smaller, it can be achieved that
It is closed, it is ensured that fire resisting damper can play the fire-retardant technical purpose of fire insulation.
Embodiment 3
As shown in fig. 6, the structure diagram for the meltable bar embodiment 2 of the present invention.The meltable bar of the present embodiment, including fusing
Seat 1, fusing 1 inner sleeve of seat are installed with the core bar being slidably matched with it, and one end of core bar is equipped with heat build-up part 5, on the seat 1 that fuses with heat build-up
Part 5 is correspondingly provided with connection sheet 3, is equipped with fusible member 6 between connection sheet 3 and heat build-up part 5, the both ends of fusible member 6 respectively with heat build-up part 5
It is connected with connection sheet 3.Heat build-up chamber 7 is equipped between the heat build-up part 5 of the present embodiment and fusible member 6, the width of heat build-up part 5 is more than meltable
The width of part 6, and the both sides of heat build-up part 5 are equipped between fusible member 6 for by the heat build-up in air flow guiding to heat build-up chamber 7 respectively
Gap 8 is additionally provided with outlet deflector hole 9 on heat build-up part 5.
The fusible member of the present embodiment uses fuse sheet, and fuse sheet includes fuse sheet ontology, and the fuse sheet ontology is windward
Face be equipped with indent heat build-up chamber 11, and heat build-up chamber 11 in be equipped with for air-flow by conduction hole 10.The present embodiment it is meltable
Part is domed, and the recessed area of arch fuse sheet ontology forms the heat build-up chamber, and fusible member 6 and heat build-up part 5 are coaxial.It is easy by inciting somebody to action
Molten part 6 is set as arch, and the thermal current that can assemble its windward side heats it, makes its heating faster, can faster melt
It is disconnected.
The other structures of the present embodiment are same as Example 1, are not repeated.
The width of heat build-up part by setting heat build-up part, and is set greater than the width of fusible member by the meltable bar of the present embodiment
Degree, while heat build-up gap is set respectively between the both sides of heat build-up part and fusible member, in this way, can be by air flow guiding to heat build-up chamber
Interior, the air-flow of heat build-up intracavitary can heat the back side of fusible member so that as the fusible member front of windward side and as leeward
The fusible member back side can heated fast heating, with being consistent by temperature in pipeline, and can fuse in time；Due to easy
Molten part fuses in time, at this time the temperature at fire resisting damper also within controllable be divided into, therefore fire resisting damper heat expansion deformation it is smaller, it can be achieved that
It is closed, it is ensured that fire resisting damper can play the fire-retardant technical purpose of fire insulation.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.The equivalent substitute or transformation that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is subject to claims.
Claims (10)
1. a kind of meltable bar, including the seat that fuses, the fusing seat inner sleeve is installed with the core bar being slidably matched with it, and feature exists
In：One end of the core bar is equipped with heat build-up part, and with the heat build-up part connection sheet, the connection sheet are correspondingly provided on the fusing seat
Fusible member is equipped between the heat build-up part, the both ends of the fusible member are connected respectively with the heat build-up part and the connection sheet；
Heat build-up chamber is equipped between the heat build-up part and the fusible member, the width of the heat build-up part is more than the width of the fusible member
Degree, and the both sides of the heat build-up part were equipped between the fusible member respectively for gathering air flow guiding to the heat build-up intracavitary
Temperature gap is additionally provided at least one outlet deflector hole on the heat build-up part.
2. meltable bar according to claim 1, it is characterised in that：The heat build-up part is used and is opened towards described fusible member one end
The shroud-like structure of mouth, the width of the opening are more than the width of the fusible member.
3. meltable bar according to claim 2, it is characterised in that：The heat build-up part is domed.
4. meltable bar according to claim 2, it is characterised in that：The heat build-up part includes segmental arc, the segmental arc
Both sides are respectively symmetrically equipped with the drainage plate opened to both sides.
5. meltable bar according to claim 2, it is characterised in that：The fusible member be located at the opening of the heat build-up part with
It is interior.
6. meltable bar according to claim 1, it is characterised in that：The one end of the heat build-up part far from the fusing seat is to institute
The distance for stating fusing seat is more than the one end of the fusible member far from the fusing seat to described the distance between the seat that fuses.
7. according to the meltable bar of claim 1-6 any one of them, it is characterised in that：The fusible member uses fuse sheet or meltable
Column.
8. meltable bar according to claim 7, it is characterised in that：The fusible member uses fuse sheet, the fuse sheet packet
Fuse sheet ontology is included, the windward side of the fuse sheet ontology is equipped with the heat build-up chamber of indent, and the heat build-up intracavitary is equipped with and is used for
Air-flow by conduction hole.
9. meltable bar according to claim 8, it is characterised in that：The fusible member is domed, and domed is described meltable
The recessed area of piece ontology forms the heat build-up chamber.
10. meltable bar according to claim 1, it is characterised in that：The minimum widith in the heat build-up gap is more than or equal to
1mm。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610853460.8A CN106246976B (en) | 2016-09-27 | 2016-09-27 | A kind of meltable bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610853460.8A CN106246976B (en) | 2016-09-27 | 2016-09-27 | A kind of meltable bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106246976A CN106246976A (en) | 2016-12-21 |
| CN106246976B true CN106246976B (en) | 2018-06-19 |
Family
ID=57611930
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610853460.8A Active CN106246976B (en) | 2016-09-27 | 2016-09-27 | A kind of meltable bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106246976B (en) |
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| JPH10272204A (en) * | 1997-03-31 | 1998-10-13 | Nohmi Bosai Ltd | Sensing head and sprinkler head |
| JP2001079107A (en) * | 1999-09-14 | 2001-03-27 | Senju Sprinkler Kk | Heat collecting plate mounting mechanism for sprinkler fire extinguishing equipment |
| CN201348075Y (en) * | 2008-12-29 | 2009-11-18 | 张晓强 | Fireproofing check valve |
| CN201469950U (en) * | 2009-07-10 | 2010-05-19 | 青岛中阳消防科技有限公司 | Hanging superfine dry powder fire extinguisher |
| CN202746698U (en) * | 2012-07-11 | 2013-02-20 | 江苏阿波罗空调净化设备制造有限公司 | Locking device in fire resisting damper |
| CN203075515U (en) * | 2013-02-05 | 2013-07-24 | 北京利达海鑫灭火系统设备有限公司 | Wind power generation power-supply-free compressed spring type detector nozzle |
| KR101331157B1 (en) * | 2009-12-29 | 2013-11-19 | 주식회사 우당기술산업 | Thermal element of sprinkler head |
| CN103418103A (en) * | 2012-05-25 | 2013-12-04 | 全龙浩 | Heat-accumulating type self-powering automatic fire valve |
| CN104114242A (en) * | 2011-12-27 | 2014-10-22 | 金盛宇 | Venturi sprinkler for controlling smoke and apparatus for removing smoke and poisonous gas |
| CN206093094U (en) * | 2016-09-27 | 2017-04-12 | 重庆双江消防通风设备制造安装有限公司 | Fusible pole |
-
2016
- 2016-09-27 CN CN201610853460.8A patent/CN106246976B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10272204A (en) * | 1997-03-31 | 1998-10-13 | Nohmi Bosai Ltd | Sensing head and sprinkler head |
| JP2001079107A (en) * | 1999-09-14 | 2001-03-27 | Senju Sprinkler Kk | Heat collecting plate mounting mechanism for sprinkler fire extinguishing equipment |
| CN201348075Y (en) * | 2008-12-29 | 2009-11-18 | 张晓强 | Fireproofing check valve |
| CN201469950U (en) * | 2009-07-10 | 2010-05-19 | 青岛中阳消防科技有限公司 | Hanging superfine dry powder fire extinguisher |
| KR101331157B1 (en) * | 2009-12-29 | 2013-11-19 | 주식회사 우당기술산업 | Thermal element of sprinkler head |
| CN104114242A (en) * | 2011-12-27 | 2014-10-22 | 金盛宇 | Venturi sprinkler for controlling smoke and apparatus for removing smoke and poisonous gas |
| CN103418103A (en) * | 2012-05-25 | 2013-12-04 | 全龙浩 | Heat-accumulating type self-powering automatic fire valve |
| CN202746698U (en) * | 2012-07-11 | 2013-02-20 | 江苏阿波罗空调净化设备制造有限公司 | Locking device in fire resisting damper |
| CN203075515U (en) * | 2013-02-05 | 2013-07-24 | 北京利达海鑫灭火系统设备有限公司 | Wind power generation power-supply-free compressed spring type detector nozzle |
| CN206093094U (en) * | 2016-09-27 | 2017-04-12 | 重庆双江消防通风设备制造安装有限公司 | Fusible pole |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106246976A (en) | 2016-12-21 |
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