DE20320749U1 - Ultrasonic measurement unit for determining the properties, e.g. density, filling level, viscosity, of liquid held in a storage or transport tank has an ultrasonic transceiver arranged in a sound guidance tube and a thermometer - Google Patents
Ultrasonic measurement unit for determining the properties, e.g. density, filling level, viscosity, of liquid held in a storage or transport tank has an ultrasonic transceiver arranged in a sound guidance tube and a thermometer Download PDFInfo
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- DE20320749U1 DE20320749U1 DE20320749U DE20320749U DE20320749U1 DE 20320749 U1 DE20320749 U1 DE 20320749U1 DE 20320749 U DE20320749 U DE 20320749U DE 20320749 U DE20320749 U DE 20320749U DE 20320749 U1 DE20320749 U1 DE 20320749U1
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- 239000007788 liquid Substances 0.000 title claims abstract description 32
- 238000005259 measurement Methods 0.000 title abstract description 11
- 238000002604 ultrasonography Methods 0.000 claims abstract description 11
- 239000000523 sample Substances 0.000 claims description 15
- 238000002592 echocardiography Methods 0.000 claims description 9
- 238000011156 evaluation Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 238000013016 damping Methods 0.000 claims description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000009529 body temperature measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/032—Analysing fluids by measuring attenuation of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/296—Acoustic waves
- G01F23/2962—Measuring transit time of reflected waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/02—Analysing fluids
- G01N29/024—Analysing fluids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N9/24—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing the transmission of wave or particle radiation through the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
- G01N11/10—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material
- G01N11/16—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties by moving a body within the material by measuring damping effect upon oscillatory body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02818—Density, viscosity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02836—Flow rate, liquid level
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02881—Temperature
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Acoustics & Sound (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
Ultraschallmessgerät zur Bestimmung von Stoffkennwerten von Flüssigkeiten in Transport- oder Lagerbehältern mittels eines Temperaturmessers und eines Ultraschallsenders und -empfängers in einem Schallführungsrohr mit Referenzmarken und einer Auswertevorrichtung des Ultraschallempfangs mittels einer Ultraschallsonde sowie der gemessenen Temperatur in einer Messelektronik.Ultrasonic measuring device for determination of substance characteristics of liquids in transport or storage containers by means of a temperature meter and an ultrasonic transmitter and -empfängers in a sound guide tube with reference marks and an evaluation device of the ultrasonic receiving means an ultrasonic probe and the measured temperature in one Measurement electronics.
Ultraschallmessgeräte sind üblich zur Messung des Füllstandes von Flüssigkeiten in stationären und mobilen Behältern. Diese Messungen können aufgrund von unterschiedlichen Stoffkennwerten der Flüssigkeiten und der damit verbundenen veränderten Laufzeiten der Ultraschallsignale sehr fehlerbehaftet sein. Eine Fehlerquelle wird oft durch die Kombination der Laufzeitmessung mit einer Temperaturmessung verringert, was aber für eine größere Genauigkeit nicht ausreicht.Ultrasonic measuring devices are usual for Measurement of the level of liquids in stationary and mobile containers. These measurements can due to different material characteristics of the liquids and the associated changed Transit times of the ultrasonic signals be very faulty. A Error source is often due to the combination of transit time measurement decreased with a temperature measurement, but for greater accuracy not enough.
Ein
Messgerät,
welches mit Referenzmarken arbeitet, sind in der Patentanmeldung
Es ist Aufgabe der Erfindung, das Ultraschallmeßgerät weiter zu verbessern sowie weitere Stoffkennwerte, wie die Viskosität der Flüssigkeit, bestimmbar zu machen.It The object of the invention is to further improve the ultrasonic measuring device and To make further material properties, such as the viscosity of the liquid determinable.
Gelöst wird diese Aufgabe dadurch, dass der Sender Impulspakete aussendet und die Meßelektronik aus der jeweils gemessenen Laufzeit der empfangenen Impulspakete eine Dichte der Flüssigkeit und eine Füllhöhe im Behälter bestimmt.Is solved this task in that the transmitter emits pulse packets and the measuring electronics from the respective measured transit time of the received pulse packets a density of the liquid and determines a filling level in the container.
Eine vorteilhafte Ausgestaltung der Erfindung ist in den Unteransprüchen angegeben.A advantageous embodiment of the invention is specified in the subclaims.
Die Dichte einer Flüssigkeit wird aus dem Kompressionsmodul der jeweiligen Flüssigkeit bestimmt. Dazu ist notwendig, die Laufzeiten der Ultraschallsignale in der Flüssigkeit zu messen. Das Schallführungsrohr besitzt dazu exakt positionierte Referenzmarken mit jeweils einem bestimmten Abstand zu der Ultraschallsonde. An diesen Referenzmarken erfolgen Reflexionen der Ultraschallsignale, die von der Ultraschallsonde aufgenommen werden und deren Laufzeit gemessen wird.The Density of a liquid is determined from the compression modulus of the respective fluid. Is to necessary, the transit times of the ultrasonic signals in the liquid to eat. The sound guide tube has exactly positioned reference marks with one each certain distance to the ultrasound probe. At these reference marks reflections of the ultrasound signals coming from the ultrasound probe be recorded and whose duration is measured.
Die Schallgeschwindigkeit Vs wird nach folgender Formel bestimmt:The Speed of sound Vs is determined according to the following formula:
Vs = Sr/Tp, wobei Sr der doppelte Abstand zwischen der Referenzmarke und der Sonde ist und Tp die gemessene Laufzeitvs = Sr / Tp, where Sr is twice the distance between the reference mark and the probe is and Tp is the measured transit time
Daraus wird die Dichte R wird dann nach folgender Formel berechnet:from that if the density R is then calculated according to the following formula:
R = K/Vs2, wobei die Kompressibilität K der Flüssigkeit konstant ist.R = K / Vs 2 , where the compressibility K of the liquid is constant.
Die Kompressibilität wird aus Tabellen gewonnen und das Messsystem mit bekannten Eigenschaften von Flüssigkeiten geeicht.The compressibility is obtained from tables and the measuring system with known characteristics of liquids calibrated.
Die Füllhöhe im Behälter wird aus der Laufzeit des Endechos im Verhältnis zu der Laufzeit zu den Referenzmarken errechnet.The Filling level in the container becomes from the term of the end echo in relation to the term to the Reference marks calculated.
Die Viskosität der Flüssigkeit ist bestimmt durch die kinematische und die dynamische Viskosität, wobei die dynamische Viskosität temperatur abhängig ist. Durch Messung der Dichte, der Temperatur und Auswertung der Hüllkurve der empfangenen Impulspakete bezüglich Dämpfung und Anstieg der Hüllkurve können beide Viskositäten anhand von Referenztabellen bestimmt werden. Die Dämpfung entspricht dabei dem Unterschied der maximalen Amplituden der Hüllkurven der empfangenen Impulspakete von benachbarten Referenzmarken.The viscosity the liquid is determined by the kinematic and the dynamic viscosity, wherein the dynamic viscosity temperature dependent is. By measuring the density, temperature and evaluation of the envelope of the received pulse packets with respect to damping and increase the envelope can both viscosities determined by reference tables. The damping corresponds doing the difference of the maximum amplitudes of the envelopes the received pulse packets from adjacent reference marks.
Um die Echos der Referenzmarken in einem weiten Zeitfenster auswerten zu können, ist die Länge der Impulspakete klein gegenüber der Laufzeit zwischen Referenzmarken. So beträgt beispielsweise die Länge eines Impulspaketes 10 us bei einer Laufzeit von 80 us.Around evaluate the echoes of the reference marks in a wide time window to be able to is the length the pulse packets small across the term between reference marks. For example, the length is one Pulse packet 10 μs with a running time of 80 μs.
Die Frequenz der Impulse ist günstigerweise so gewählt, dass sich entsprechend der erwarteten Kompressibilität der Flüssigkeit eine gut auswertbare Hüllkurve der empfangenen Echos von den Referenzmarken ergibt.The Frequency of the pulses is conveniently so selected that according to the expected compressibility of the liquid a well evaluable envelope gives the received echoes from the reference marks.
Wenn die Flüssigkeiten Schichten in den Behältern ausgebildet haben, ist es günstig, die Stoffkennwerte für die einzelnen Schichten separat zu bestimmen. Dazu werden die Echos von den verschieden Referenzmarken gesondert ausgewertet und damit dann ein Schichtenprofil der Stoffkennwerte, wie etwa der Dichte, erstellt. Ebenso ist es auch günstig. aus den unterschiedlichen gemessenen Werten einen Mittelwert der Stoffkennwerte über den gesamten Behälterinhalt zu bilden.If the liquids Layers in the containers have trained, it is convenient the substance characteristics for to determine the individual layers separately. These are the echoes evaluated separately from the different reference marks and thus then a layer profile of the material characteristics, such as the density, created. It is also cheap. out the different measured values a mean value of the substance characteristic values over the entire container contents to build.
Wenn die Dichte, Temperatur und Viskosität der Flüssigkeit bestimmt ist, lassen sich aus diesen Werten einfach mittels Referenztabellen weitere Stoffkennwerte wie Oktanzahl, Alkoholgehalt oder Fettgehalt bestimmen.If the density, temperature and viscosity of the liquid is determined From these values simply by means of reference tables further substance characteristics such as octane, alcohol or fat content.
Das vorbeschriebene Verfahren zur Bestimmung der Stoffkennwerte von Flüssigkeiten wird mit einem Ultraschallmessgerät durchgeführt, dass eine oder mehrere Ultraschallsonden zum Aussenden und Empfangen von Impulspaketen in ein Schallführungsrohr besitzt. In diesem Rohr sind mehrere Referenzmarken mit definiertem Abstand untereinander und zur Ultraschallsonde angebracht. Um die Schallausbreitung von und zu nachfolgenden Referenzmarken nicht zu behindern, sind die Referenzmarken mit einem definierten Winkel zueinander in das Schallführungsrohr eingebracht.The above-described method for determining the substance characteristic values of liquids is carried out with an ultrasound measuring device that has one or more ultrasound probes for emitting and receiving pulse packets in a sound guide tube. In this tube several reference marks with a defined distance between them and the ultrasonic probe are mounted. In order not to hinder the propagation of sound from and to subsequent reference marks, the reference marks are introduced at a defined angle to each other in the sound guide tube.
Damit sich die Flüssigkeit gut im Schallführungsrohr verteilt, sind an definierten Stellen Entlüftungslöcher vorgesehen. Störechos von diesen Entlüftungslöchern werden in der Messelektronik ausgeblendet.In order to the liquid good in the sound tube distributed, vent holes are provided at defined locations. False echoes of these vents are hidden in the measuring electronics.
Mit dem Ultraschallmessgerät können auch Flüssigkeiten in hohen Behältern gemessen werden. Dazu werden gleichartige Schallführungsrohre aneinander gesteckt und damit dass Messsystem verlängert.With the ultrasonic measuring device can also liquids in tall containers be measured. These are similar sound guide tubes stuck together and thus that extended measuring system.
Zur Temperaturmessung sind in das Schallführungsrohr Temperatursensoren eingesetzt, die mit der Messelektronik verbunden sind. Wenn diese im gleichen Abstand wie die Referenzmarken eingesetzt sind, können damit die Schichtprofile bestimmt werden. In der Messelektronik befinden sich Auswerteschaltungen, welche die Temperaturen der Sensoren als Zahlenwert bestimmen und der weiteren Berechnung zuführen.to Temperature measurement are in the sound tube temperature sensors used, which are connected to the measuring electronics. If those at the same distance as the reference marks are used, can with it the layer profiles are determined. Located in the measuring electronics evaluation circuits which the temperatures of the sensors as Determine the numerical value and send it to the next calculation.
Die Messelektronik besitzt Schaltungen zur Analyse der Laufzeiten der an den Grenzschichten und an den Referenzmarken erzeugten Echos. Um gute Genauigkeiten der Messung zu erreichen, besitzen diese eine Auflösung von unter einer Mikrosekunde.The Messelektronik has circuits for analyzing the maturity of the echoes generated at the boundary layers and at the reference marks. To achieve good accuracies of the measurement, they have one resolution of under a microsecond.
Für das erfindungsgemäße Verfahren sind weiterhin in die Messelektronik Schaltungen zur Analyse der Hüllkurve der empfangenen Impulspakete vorhanden. Hier wird insbesondere die maximale Amplitude der Hüllkurve zur Bestimmung der Dämpfüng und die Anstiegsteilheit der Hüllkurve ausgewertet und als Zahlenwerte zur weiteren Berechnung zur Verfügung gestellt.For the inventive method are still in the measuring electronics circuits for analyzing the envelope the received pulse packets available. Here in particular the maximum amplitude of the envelope for the determination of attenuation and the Rise slope of the envelope evaluated and provided as numerical values for further calculation.
Eine vorteilhafte Ausführung der Erfindung ist beispielhaft in den Figuren beschrieben.A advantageous embodiment The invention is described by way of example in the figures.
In
In
Die von den Messschaltungen gelieferten Werte werden in der Auswerteschaltung A ausgewertet und mit den Werten in der Referenztabelle RT verknüpft. Somit werden die Stoffkennwerte in der Auswerteschaltung bestimmt.The Values supplied by the measuring circuits are in the evaluation circuit A is evaluated and linked to the values in the reference table RT. Consequently the substance characteristics are determined in the evaluation circuit.
In
In
- 11
- Behältercontainer
- 22
- Messelektronikmeasuring electronics
- 33
- Ultraschallmessgerätultrasonic meter
- 44
- SchallführungsrohrFocus tube
- 55
- Ultraschallsondeultrasound probe
- 66
- Referenzmarkenreference marks
- 77
- Füllhöhefilling height
- 88th
- Temperatursensortemperature sensor
- AA
- Auswerteschaltungevaluation
- DD
- Dämpfungdamping
- GTGT
- Umschalterswitch
- HH
- Hüllkurveenvelope
- HKHK
- HüllkurvenmessungHüllkurvenmessung
- II
- ImpulseImpulse
- IGIG
- Impulsgeneratorpulse generator
- LL
- LaufzeitmessungRuntime measurement
- RTRT
- Referenztabellereference table
- TT
- Zeitmessungtimekeeping
- tntn
- Zeitpunktetimings
- xnxn
- AmpitudenwerteAmpitudenwerte
Claims (15)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20320749U DE20320749U1 (en) | 2003-11-03 | 2003-11-03 | Ultrasonic measurement unit for determining the properties, e.g. density, filling level, viscosity, of liquid held in a storage or transport tank has an ultrasonic transceiver arranged in a sound guidance tube and a thermometer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20320749U DE20320749U1 (en) | 2003-11-03 | 2003-11-03 | Ultrasonic measurement unit for determining the properties, e.g. density, filling level, viscosity, of liquid held in a storage or transport tank has an ultrasonic transceiver arranged in a sound guidance tube and a thermometer |
| DE10351253 | 2003-11-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20320749U1 true DE20320749U1 (en) | 2005-04-21 |
Family
ID=34524058
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20320749U Expired - Lifetime DE20320749U1 (en) | 2003-11-03 | 2003-11-03 | Ultrasonic measurement unit for determining the properties, e.g. density, filling level, viscosity, of liquid held in a storage or transport tank has an ultrasonic transceiver arranged in a sound guidance tube and a thermometer |
Country Status (1)
| Country | Link |
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| DE (1) | DE20320749U1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006013263A1 (en) * | 2006-03-21 | 2007-09-27 | Daimlerchrysler Ag | Liquid`s urea water solution concentration determining method for exhaust gas cleaning in motor vehicle, involves determining concentration of urea water solution in liquid, under drawing of measurement of speed of sound |
| CN102235961A (en) * | 2010-04-12 | 2011-11-09 | 康斯博海运公司 | Method and device of measuring fluid density |
| ITMI20111865A1 (en) * | 2011-10-13 | 2013-04-14 | Idrabel Italia S R L | SYSTEMS AND METHODS OF VASING MAPPING |
| DE102015117441A1 (en) * | 2015-10-14 | 2017-04-20 | Thürwächter GmbH & Co. KG | Method for determining parameters of a substrate |
| AT520557A4 (en) * | 2018-01-24 | 2019-05-15 | Anton Paar Gmbh | Method for determining a corrected value for the viscosity-dependent speed of sound in a fluid to be examined |
| CN112798465A (en) * | 2019-11-13 | 2021-05-14 | Abb瑞士股份有限公司 | Measuring system for determining a property of a liquid in a container |
-
2003
- 2003-11-03 DE DE20320749U patent/DE20320749U1/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006013263A1 (en) * | 2006-03-21 | 2007-09-27 | Daimlerchrysler Ag | Liquid`s urea water solution concentration determining method for exhaust gas cleaning in motor vehicle, involves determining concentration of urea water solution in liquid, under drawing of measurement of speed of sound |
| CN102235961A (en) * | 2010-04-12 | 2011-11-09 | 康斯博海运公司 | Method and device of measuring fluid density |
| CN102235961B (en) * | 2010-04-12 | 2014-08-20 | 康斯博海运公司 | Method and device of measuring fluid density |
| ITMI20111865A1 (en) * | 2011-10-13 | 2013-04-14 | Idrabel Italia S R L | SYSTEMS AND METHODS OF VASING MAPPING |
| WO2013053921A1 (en) * | 2011-10-13 | 2013-04-18 | Idrabel Italia S.R.L. | Vessel mapping apparatuses and methods |
| DE102015117441A1 (en) * | 2015-10-14 | 2017-04-20 | Thürwächter GmbH & Co. KG | Method for determining parameters of a substrate |
| AT520557A4 (en) * | 2018-01-24 | 2019-05-15 | Anton Paar Gmbh | Method for determining a corrected value for the viscosity-dependent speed of sound in a fluid to be examined |
| AT520557B1 (en) * | 2018-01-24 | 2019-05-15 | Anton Paar Gmbh | Method for determining a corrected value for the viscosity-dependent speed of sound in a fluid to be examined |
| CN112798465A (en) * | 2019-11-13 | 2021-05-14 | Abb瑞士股份有限公司 | Measuring system for determining a property of a liquid in a container |
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| R207 | Utility model specification |
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| R156 | Lapse of ip right after 3 years |
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