JPH0456771B2 - - Google Patents
Info
- Publication number
- JPH0456771B2 JPH0456771B2 JP60140629A JP14062985A JPH0456771B2 JP H0456771 B2 JPH0456771 B2 JP H0456771B2 JP 60140629 A JP60140629 A JP 60140629A JP 14062985 A JP14062985 A JP 14062985A JP H0456771 B2 JPH0456771 B2 JP H0456771B2
- Authority
- JP
- Japan
- Prior art keywords
- vanadium
- zirconium
- iron
- argon
- getter
- 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 - Lifetime
Links
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 206
- 229910052786 argon Inorganic materials 0.000 claims description 103
- 239000007789 gas Substances 0.000 claims description 87
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 62
- 239000012535 impurity Substances 0.000 claims description 36
- 229910052742 iron Inorganic materials 0.000 claims description 33
- 229910052720 vanadium Inorganic materials 0.000 claims description 33
- 238000000746 purification Methods 0.000 claims description 31
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 25
- 229910045601 alloy Inorganic materials 0.000 claims description 25
- 239000000956 alloy Substances 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 25
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 25
- 229910052726 zirconium Inorganic materials 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 21
- 238000010438 heat treatment Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000008188 pellet Substances 0.000 claims description 12
- 239000000843 powder Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- ZGTNJINJRMRGNV-UHFFFAOYSA-N [V].[Fe].[Zr] Chemical compound [V].[Fe].[Zr] ZGTNJINJRMRGNV-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000003746 surface roughness Effects 0.000 claims description 5
- 229910000640 Fe alloy Inorganic materials 0.000 claims description 2
- 230000005484 gravity Effects 0.000 claims description 2
- DIVGJYVPMOCBKD-UHFFFAOYSA-N [V].[Zr] Chemical compound [V].[Zr] DIVGJYVPMOCBKD-UHFFFAOYSA-N 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 16
- 239000000872 buffer Substances 0.000 description 13
- 239000001257 hydrogen Substances 0.000 description 9
- 229910052739 hydrogen Inorganic materials 0.000 description 9
- 238000007670 refining Methods 0.000 description 9
- 239000010935 stainless steel Substances 0.000 description 8
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 7
- 229910002091 carbon monoxide Inorganic materials 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 229910002058 ternary alloy Inorganic materials 0.000 description 6
- 208000005156 Dehydration Diseases 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000018044 dehydration Effects 0.000 description 5
- 238000006297 dehydration reaction Methods 0.000 description 5
- 229910000986 non-evaporable getter Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 3
- 239000001569 carbon dioxide Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000002808 molecular sieve Substances 0.000 description 3
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- -1 iron Zirconium-vanadium-iron Chemical compound 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000001275 scanning Auger electron spectroscopy Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 229910000809 Alumel Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000792 Monel Inorganic materials 0.000 description 1
- 241001494479 Pecora Species 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 150000001485 argon Chemical class 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- YWEUIGNSBFLMFL-UHFFFAOYSA-N diphosphonate Chemical compound O=P(=O)OP(=O)=O YWEUIGNSBFLMFL-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 229910000856 hastalloy Inorganic materials 0.000 description 1
- 229910001293 incoloy Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000012925 reference material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B23/00—Noble gases; Compounds thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
- Separation Of Gases By Adsorption (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Manufacture And Refinement Of Metals (AREA)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60140629A JPS623008A (ja) | 1985-06-28 | 1985-06-28 | アルゴンの超精製装置、並びに精製方法 |
| CA000512228A CA1300344C (en) | 1985-06-28 | 1986-06-23 | Superpurifier for argon gas and process for purifying argon gas |
| FR8609025A FR2584063B1 (fr) | 1985-06-28 | 1986-06-23 | Super purificateur pour le gaz argon et procede de purification de l'argon. |
| DE3621014A DE3621014C2 (de) | 1985-06-28 | 1986-06-23 | Hochreinigungsvorrichtung für Argon und Verfahren zu deren Betrieb |
| KR1019860005145A KR930006691B1 (ko) | 1985-06-28 | 1986-06-26 | 아르곤 가스정제용 초정제장치 및 정제방법 |
| BE2/61003A BE904997A (fr) | 1985-06-28 | 1986-06-26 | Super purificateur pour le gaz argon et procede de purification de l'argon. |
| GB08615618A GB2177079A (en) | 1985-06-28 | 1986-06-26 | Superpurifier for argon gas and process for purifying argon gas |
| NL8601691A NL192260C (nl) | 1985-06-28 | 1986-06-27 | Inrichting en werkwijze voor het zuiveren van argongas. |
| IT20962/86A IT1190142B (it) | 1985-06-28 | 1986-06-27 | Super-purificatore per gas argo e relativo procedimento di purificazione |
| SE8602869A SE463511B (sv) | 1985-06-28 | 1986-06-27 | Superreningsanordning och saett foer superrening av argongas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60140629A JPS623008A (ja) | 1985-06-28 | 1985-06-28 | アルゴンの超精製装置、並びに精製方法 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS623008A JPS623008A (ja) | 1987-01-09 |
| JPH0456771B2 true JPH0456771B2 (US20110105765A1-20110505-C00013.png) | 1992-09-09 |
Family
ID=15273137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60140629A Granted JPS623008A (ja) | 1985-06-28 | 1985-06-28 | アルゴンの超精製装置、並びに精製方法 |
Country Status (10)
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1227219B (it) * | 1988-09-26 | 1991-03-27 | Getters Spa | Apparecchiatura e metodo relativo per asportare impurezze gassose da gas inerti ed assicurare livelli estremamente bassi di idrogeno |
| DE3835825C1 (US20110105765A1-20110505-C00013.png) * | 1988-10-21 | 1990-03-08 | Kernforschungsanlage Juelich Gmbh, 5170 Juelich, De | |
| DE3926015A1 (de) * | 1989-08-05 | 1991-02-07 | Messer Griesheim Gmbh | Verfahren zur feinreinigung von gasen |
| IT1237944B (it) * | 1990-01-05 | 1993-06-19 | Getters Spa | Metodo per determinare la fine della vita utile di un purificatore di gas inerte e relativa apparecchiatura |
| IT1246358B (it) * | 1990-07-12 | 1994-11-17 | Getters Spa | Processo per eliminare impurita' da un gas idruro |
| IT1247110B (it) * | 1991-02-28 | 1994-12-12 | Getters Spa | Processo per la purificazione di gas fluorurati |
| IT1270875B (it) * | 1993-04-29 | 1997-05-13 | Getters Spa | Procedimento di purificazione dell'idrogeno e purificatore relativo |
| US5238469A (en) * | 1992-04-02 | 1993-08-24 | Saes Pure Gas, Inc. | Method and apparatus for removing residual hydrogen from a purified gas |
| US6436352B1 (en) | 1993-04-29 | 2002-08-20 | Saes Getter, S.P.A. | Hydrogen purification |
| RU2123971C1 (ru) * | 1993-04-29 | 1998-12-27 | Саес Геттерс С.П.А. | Способ удаления газообразных примесей из потока водорода и устройство для его осуществления |
| CA2117319A1 (en) * | 1993-07-12 | 1995-01-13 | John D. Baker | Method for the purification of noble gases, nitrogen and hydrogen |
| JP3462560B2 (ja) * | 1994-03-04 | 2003-11-05 | 日本パイオニクス株式会社 | 水素ガスの精製方法 |
| KR970008347B1 (ko) * | 1994-04-12 | 1997-05-23 | 한국에너지기술연구소 | 암모니아 퍼지가스에서 아르곤 및 수소를 고농도로 분리하는 흡착분리방법과 그 장치 |
| WO1997003745A1 (en) * | 1995-07-21 | 1997-02-06 | Ultrapure Systems, Inc. | Single gas purifier vessel and heat exchanger |
| DE19528784C1 (de) * | 1995-08-04 | 1996-08-29 | Inst Neuwertwirtschaft Gmbh | Verfahren zur Reinigung von Inertgasen mittels Sorbenzien |
| WO1997035805A1 (en) * | 1996-03-28 | 1997-10-02 | Saes Pure Gas, Inc. | Method and apparatus for purifying hydrogen gas |
| US6059859A (en) * | 1997-09-19 | 2000-05-09 | Aeronex, Inc. | Method, composition and apparatus for water removal from non-corrosive gas streams |
| WO1999019049A2 (en) * | 1997-10-15 | 1999-04-22 | Saes Pure Gas, Inc. | Semiconductor manufacturing system with getter safety device |
| WO1999019050A1 (en) | 1997-10-15 | 1999-04-22 | Saes Pure Gas, Inc. | Gas purification system with safety device and method for purifying gases |
| US6068685A (en) * | 1997-10-15 | 2000-05-30 | Saes Pure Gas, Inc. | Semiconductor manufacturing system with getter safety device |
| US6733571B1 (en) * | 1999-07-12 | 2004-05-11 | Saes Pure Gas, Inc. | Gas purification system with an integrated hydrogen sorption and filter assembly |
| IT1319667B1 (it) * | 2000-11-17 | 2003-10-23 | Getters Spa | Metodo per la misura della concentrazione di azoto in argon mediantespettroscopia di mobilita' ionica. |
| ITMI20011193A1 (it) | 2001-06-06 | 2002-12-06 | Getters Spa | Metodo per la misura mediante spettroscopia di mobilita' ionica dellaconcentrazione di acqua in argon, idrogeno, azoto e elio |
| JP4520372B2 (ja) * | 2005-06-21 | 2010-08-04 | シーケーディ株式会社 | 精製筒及び空気又は不活性ガスの循環精製装置 |
| DE102009024055A1 (de) | 2009-06-05 | 2010-12-09 | Netzsch-Gerätebau GmbH | Thermoanalysevorrichtung und Thermoanalyseverfahren |
| CN104291284B (zh) * | 2014-10-09 | 2016-06-22 | 昆明物理研究所 | 一种超纯氩气在线净化系统及方法 |
| US10071336B1 (en) | 2017-01-24 | 2018-09-11 | Northrop Grumman Systems Corporation | Gas purification getter construction for airborne and space applications |
| JP2018150246A (ja) * | 2017-03-10 | 2018-09-27 | 国立大学法人東北大学 | 有機化合物析出方法 |
| CN114193028A (zh) * | 2021-11-26 | 2022-03-18 | 中国核工业第五建设有限公司 | 保护气纯度提高装置、保护气提纯方法、焊接保护方法 |
| CN115231533A (zh) * | 2022-08-09 | 2022-10-25 | 上海交通大学 | 低氡放射率高温高纯惰性气体纯化器 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55124538A (en) * | 1979-02-05 | 1980-09-25 | Getters Spa | Method of absorbing water* steam and other gas by using nonnvaporizing threeedimensional getter alloy |
| JPS59107910A (ja) * | 1982-12-10 | 1984-06-22 | Toshiba Corp | アルゴンガスの精製方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961925A (en) * | 1959-04-10 | 1964-06-24 | Western Detail Manufacturers L | Improvements relating to the purification of argon and helium gas |
| FR1539693A (fr) * | 1966-06-07 | 1968-09-20 | Japan Pure Hydrogen Company Lt | Procédé d'enlèvement des impuretés dans les gaz rares |
| BE792561A (en) * | 1972-12-11 | 1973-03-30 | Getters Spa | Gas purifier - esp for rare gases and hydrogen with regeneration system for absorber cartridges |
| IT1115156B (it) * | 1979-04-06 | 1986-02-03 | Getters Spa | Leghe zr-fe per l'assorbimento di idrogeno a basse temperature |
| IT1198325B (it) * | 1980-06-04 | 1988-12-21 | Getters Spa | Struttura e composizione getteranti,particolarmente adatti per basse temperature |
| FR2557810A1 (fr) * | 1984-01-05 | 1985-07-12 | Analyseurs Epurateur Sarl Ste | Procede non polluant pour eliminer les traces d'impuretes contenues dans les gaz rares portes a haute temperature |
-
1985
- 1985-06-28 JP JP60140629A patent/JPS623008A/ja active Granted
-
1986
- 1986-06-23 CA CA000512228A patent/CA1300344C/en not_active Expired - Fee Related
- 1986-06-23 FR FR8609025A patent/FR2584063B1/fr not_active Expired - Lifetime
- 1986-06-23 DE DE3621014A patent/DE3621014C2/de not_active Expired - Lifetime
- 1986-06-26 GB GB08615618A patent/GB2177079A/en active Granted
- 1986-06-26 KR KR1019860005145A patent/KR930006691B1/ko not_active IP Right Cessation
- 1986-06-26 BE BE2/61003A patent/BE904997A/fr not_active IP Right Cessation
- 1986-06-27 IT IT20962/86A patent/IT1190142B/it active
- 1986-06-27 NL NL8601691A patent/NL192260C/nl not_active IP Right Cessation
- 1986-06-27 SE SE8602869A patent/SE463511B/sv not_active IP Right Cessation
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55124538A (en) * | 1979-02-05 | 1980-09-25 | Getters Spa | Method of absorbing water* steam and other gas by using nonnvaporizing threeedimensional getter alloy |
| US4312669A (en) * | 1979-02-05 | 1982-01-26 | Saes Getters S.P.A. | Non-evaporable ternary gettering alloy and method of use for the sorption of water, water vapor and other gases |
| US4312669B1 (US20110105765A1-20110505-C00013.png) * | 1979-02-05 | 1992-04-14 | Getters Spa | |
| JPS59107910A (ja) * | 1982-12-10 | 1984-06-22 | Toshiba Corp | アルゴンガスの精製方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8602869L (sv) | 1986-12-29 |
| DE3621014A1 (de) | 1987-01-08 |
| IT8620962A1 (it) | 1987-12-27 |
| IT8620962A0 (it) | 1986-06-27 |
| GB2177079B (US20110105765A1-20110505-C00013.png) | 1989-12-20 |
| NL192260B (nl) | 1996-12-02 |
| CA1300344C (en) | 1992-05-12 |
| NL192260C (nl) | 1997-04-03 |
| GB2177079A (en) | 1987-01-14 |
| GB8615618D0 (en) | 1986-07-30 |
| NL8601691A (nl) | 1987-01-16 |
| FR2584063B1 (fr) | 1990-12-21 |
| FR2584063A1 (fr) | 1987-01-02 |
| DE3621014C2 (de) | 1995-05-11 |
| SE8602869D0 (sv) | 1986-06-27 |
| KR930006691B1 (ko) | 1993-07-22 |
| SE463511B (sv) | 1990-12-03 |
| KR870000239A (ko) | 1987-02-17 |
| JPS623008A (ja) | 1987-01-09 |
| IT1190142B (it) | 1988-02-10 |
| BE904997A (fr) | 1986-10-16 |
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