NO135606B - - Google Patents
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- Publication number
- NO135606B NO135606B NO534/73A NO53473A NO135606B NO 135606 B NO135606 B NO 135606B NO 534/73 A NO534/73 A NO 534/73A NO 53473 A NO53473 A NO 53473A NO 135606 B NO135606 B NO 135606B
- Authority
- NO
- Norway
- Prior art keywords
- gas
- crucible
- metal
- vacuum
- melt
- Prior art date
Links
- 229910052751 metal Inorganic materials 0.000 claims description 51
- 239000002184 metal Substances 0.000 claims description 51
- 238000000034 method Methods 0.000 claims description 16
- 239000000155 melt Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 238000007872 degassing Methods 0.000 claims description 7
- 239000011819 refractory material Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000005587 bubbling Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 95
- 239000001257 hydrogen Substances 0.000 description 15
- 229910052739 hydrogen Inorganic materials 0.000 description 15
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 14
- 238000002347 injection Methods 0.000 description 13
- 239000007924 injection Substances 0.000 description 13
- 238000009792 diffusion process Methods 0.000 description 9
- 239000002893 slag Substances 0.000 description 8
- 239000000289 melt material Substances 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000009835 boiling Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000011261 inert gas Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- 238000000137 annealing Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 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
- 229910052786 argon Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000012159 carrier gas Substances 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000009489 vacuum treatment Methods 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000954 Medium-carbon steel Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- -1 iron metals Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/006—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber the recirculation taking place in the combustion chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US22525972A | 1972-02-10 | 1972-02-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO135606B true NO135606B (es) | 1977-01-17 |
| NO135606C NO135606C (es) | 1977-04-27 |
Family
ID=22844192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO534/73A NO135606C (es) | 1972-02-10 | 1973-02-09 |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US3741166A (es) |
| JP (2) | JPS4889426A (es) |
| AU (1) | AU470905B2 (es) |
| BE (1) | BE795261A (es) |
| CA (1) | CA969463A (es) |
| CH (1) | CH577660A5 (es) |
| DE (1) | DE2306342A1 (es) |
| ES (1) | ES411507A1 (es) |
| FI (1) | FI58014C (es) |
| FR (1) | FR2182841B1 (es) |
| GB (1) | GB1426091A (es) |
| IT (1) | IT978949B (es) |
| NL (1) | NL7301777A (es) |
| NO (1) | NO135606C (es) |
| SE (1) | SE382493B (es) |
Families Citing this family (69)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2303280C2 (de) * | 1973-01-24 | 1982-07-29 | Robert von Dipl.-Ing. 8032 Gräfelfing Linde | Brenner für fließfähige Brennstoffe |
| JPS50160833A (es) * | 1973-12-22 | 1975-12-26 | ||
| DE2605134C2 (de) * | 1975-02-12 | 1984-10-04 | Fascione, Pietro, Busto Arsizio, Varese | Vorrichtung zur Zuführung einer Mischung von Luft und rückgeführtem Rauchgas zu einem Brenner |
| US4364725A (en) * | 1977-01-08 | 1982-12-21 | Deutsche Forschungs- Und Versuchsanstalt Fur Luft- Und Raumfahrt E.V. | Blue-flame oil burner |
| JPS54141027U (es) * | 1978-03-24 | 1979-10-01 | ||
| US4287857A (en) * | 1979-09-11 | 1981-09-08 | Leo Schnitzer | Burner-boiler combination and an improved burner construction therefor |
| US4380429A (en) * | 1979-11-02 | 1983-04-19 | Hague International | Recirculating burner |
| JPS58127008A (ja) * | 1982-01-22 | 1983-07-28 | Nissei Oobaru Kk | 液体燃料の燃焼装置 |
| JPS58127007A (ja) * | 1982-01-22 | 1983-07-28 | Nissei Oobaru Kk | 液体燃料の燃焼装置 |
| JPS58200911A (ja) * | 1982-05-17 | 1983-11-22 | Inax Corp | 液体燃料の燃焼装置 |
| JPS598021U (ja) * | 1982-07-08 | 1984-01-19 | 額賀 義盛 | 超広角燃焼式油噴霧バ−ナ装置 |
| JPS59157903A (ja) * | 1983-02-24 | 1984-09-07 | 株式会社イナックス | 熱交換装置 |
| US4728282A (en) * | 1984-09-12 | 1988-03-01 | Air, Ltd. | Method and apparatus for conducting a substantially isothermal combustion process in a combustor |
| GB8504475D0 (en) * | 1985-02-21 | 1985-03-27 | Tauranca Ltd | Fluid fuel fired burner |
| DE3666625D1 (en) * | 1985-02-21 | 1989-11-30 | Tauranca Ltd | Fluid fuel fired burner |
| US4659305A (en) * | 1985-12-30 | 1987-04-21 | Aqua-Chem, Inc. | Flue gas recirculation system for fire tube boilers and burner therefor |
| DE3770425D1 (de) * | 1986-12-11 | 1991-07-04 | Dreizler Walter | Heizkesselanlage mit externer abgasrueckfuehrung. |
| CH677139A5 (es) * | 1988-06-24 | 1991-04-15 | Ygnis Sa | |
| CH677965A5 (es) * | 1988-09-02 | 1991-07-15 | Strebelwerk Ag | |
| DE3928384A1 (de) * | 1989-08-28 | 1991-03-21 | Viessmann Hans | Geblaesebrenner fuer heizkessel mit abgasrueckfuehrung |
| DE3938786A1 (de) * | 1989-11-23 | 1991-05-29 | Elco Oel & Gasbrenner | Brenner zur verbrennung von fluessigen oder gasfoermigen brennstoffen |
| US5275554A (en) * | 1990-08-31 | 1994-01-04 | Power-Flame, Inc. | Combustion system with low NOx adapter assembly |
| NL9002150A (nl) * | 1990-10-03 | 1992-05-06 | Veg Gasinstituut Nv | Compacte gasgestookte luchtverhitter. |
| DE59010544D1 (de) * | 1990-12-19 | 1996-11-21 | Asea Brown Boveri | Brennerkopf für die vormischartige Verbrennung eines flüssigen Brennstoffes in einer atmosphärischen Feuerungsanlage |
| DE4113412C2 (de) * | 1991-04-20 | 1999-04-01 | Saacke Gmbh & Co Kg | Vorrichtung zur Verbrennung von flüssigem oder gasförmigem Brennstoff für eine Feuerungsanlage |
| US5462430A (en) * | 1991-05-23 | 1995-10-31 | Institute Of Gas Technology | Process and apparatus for cyclonic combustion |
| US5220888A (en) * | 1991-08-01 | 1993-06-22 | Institute Of Gas Technology | Cyclonic combustion |
| US5209187A (en) * | 1991-08-01 | 1993-05-11 | Institute Of Gas Technology | Low pollutant - emission, high efficiency cyclonic burner for firetube boilers and heaters |
| EP0612959A1 (en) * | 1993-02-23 | 1994-08-31 | D.W. Clysan B.V. | Venturi burner |
| US5522158A (en) * | 1994-03-07 | 1996-06-04 | Astec Industries, Inc. | Dryer drum coater having recirculation chamber for VOC/NOX reduction |
| US6085699A (en) * | 1995-04-04 | 2000-07-11 | Srp 687 Pty Ltd. | Air inlets for water heaters |
| US6295951B1 (en) | 1995-04-04 | 2001-10-02 | Srp 687 Pty. Ltd. | Ignition inhibiting gas water heater |
| US6196164B1 (en) | 1995-04-04 | 2001-03-06 | Srp 687 Pty. Ltd. | Ignition inhibiting gas water heater |
| US6135061A (en) * | 1995-04-04 | 2000-10-24 | Srp 687 Pty Ltd. | Air inlets for water heaters |
| US5797355A (en) | 1995-04-04 | 1998-08-25 | Srp 687 Pty Ltd | Ignition inhibiting gas water heater |
| US6155211A (en) * | 1995-04-04 | 2000-12-05 | Srp 687 Pty Ltd. | Air inlets for water heaters |
| US5971745A (en) * | 1995-11-13 | 1999-10-26 | Gas Research Institute | Flame ionization control apparatus and method |
| US6199367B1 (en) * | 1996-04-26 | 2001-03-13 | General Electric Company | Air modulated carburetor with axially moveable fuel injector tip and swirler assembly responsive to fuel pressure |
| US5941200A (en) * | 1998-01-07 | 1999-08-24 | The Water Heater Industry Joint Research And Development Consortium | Gas-fired water heater having plate-mounted removable bottom end burner and pilot assembly |
| US6095797A (en) * | 1998-03-20 | 2000-08-01 | Robertshaw Controls Company | Quick change pilot assembly and method of assembly |
| US6142106A (en) * | 1998-08-21 | 2000-11-07 | Srp 687 Pty Ltd. | Air inlets for combustion chamber of water heater |
| US6293230B1 (en) | 1998-10-20 | 2001-09-25 | Srp 687 Pty Ltd. | Water heaters with flame traps |
| US6223697B1 (en) * | 1998-08-21 | 2001-05-01 | Srp 687 Pty Ltd. | Water heater with heat sensitive air inlet |
| US6299433B1 (en) | 1999-11-05 | 2001-10-09 | Gas Research Institute | Burner control |
| CA2493884A1 (en) * | 2002-07-19 | 2004-01-29 | Shell Internationale Research Maatschappij B.V. | Use of a blue flame burner |
| EP1534996A1 (en) * | 2002-07-19 | 2005-06-01 | Shell Internationale Researchmaatschappij B.V. | Process for combustion of a liquid hydrocarbon |
| JP2005533235A (ja) * | 2002-07-19 | 2005-11-04 | シエル・インターナシヨネイル・リサーチ・マーチヤツピイ・ベー・ウイ | 黄炎式バーナーの使用 |
| US7241135B2 (en) * | 2004-11-18 | 2007-07-10 | Honeywell International Inc. | Feedback control for modulating gas burner |
| US7699026B2 (en) * | 2005-01-04 | 2010-04-20 | Bradford White Corporation | Insulation kit for use with a water heater |
| US20090165733A1 (en) * | 2007-12-26 | 2009-07-02 | Ferguson Mark A | Inwardly firing burner and uses thereof |
| US8083517B2 (en) * | 2008-03-28 | 2011-12-27 | Fives North American Combustion, Inc. | Method of operating a furnace |
| US20090311641A1 (en) * | 2008-06-13 | 2009-12-17 | Gunther Berthold | Gas flame stabilization method and apparatus |
| US20100175380A1 (en) * | 2009-01-13 | 2010-07-15 | General Electric Company | Traversing fuel nozzles in cap-less combustor assembly |
| EP2295858A1 (de) * | 2009-08-03 | 2011-03-16 | Siemens Aktiengesellschaft | Stabilisierung der Flamme eines Brenners |
| US8920159B2 (en) * | 2011-11-23 | 2014-12-30 | Honeywell International Inc. | Burner with oxygen and fuel mixing apparatus |
| NL2008225C2 (nl) * | 2012-02-03 | 2013-08-06 | Intergas Heating Assets B V | Verwarmingsinrichting. |
| US9182144B2 (en) * | 2012-03-02 | 2015-11-10 | Pro-Iroda Industries, Inc. | Hot air blower |
| US20130228232A1 (en) * | 2012-03-02 | 2013-09-05 | Pro-Iroda Industries, Inc. | Hot Air Blower |
| JP5555382B2 (ja) * | 2012-05-25 | 2014-07-23 | 日野自動車株式会社 | 排気浄化装置用バーナー |
| US9574496B2 (en) * | 2012-12-28 | 2017-02-21 | General Electric Company | System and method for a turbine combustor |
| US9869251B2 (en) * | 2015-04-27 | 2018-01-16 | DYC Turbines, LLC | Electric motor assisted airblast injector |
| US10982846B2 (en) * | 2017-06-14 | 2021-04-20 | Webster Combustion Technology Llc | Vortex recirculating combustion burner head |
| CN109611836B (zh) * | 2019-01-20 | 2020-03-31 | 襄阳市胜合燃力设备有限公司 | 球团回转窑用双涡流煤粉燃烧器 |
| CN109737395B (zh) * | 2019-01-25 | 2020-12-11 | 新冶高科技集团有限公司 | 一种醇基燃料蓄热式燃烧器 |
| CN110388839A (zh) * | 2019-05-31 | 2019-10-29 | 胡志鹏 | 热交换器及燃气锅炉 |
| AT524257B1 (de) * | 2020-10-07 | 2022-12-15 | Wienerberger Ag | Umwälzdüse für einen brennofen |
| CN112781034B (zh) * | 2021-03-18 | 2024-07-19 | 烟台龙源电力技术股份有限公司 | 偏置煤粉燃烧器和燃烧系统 |
| CN114034125B (zh) * | 2021-10-20 | 2024-03-19 | 深圳市思野精机有限公司 | 一种注射针热风加温机构 |
| CN115155352B (zh) * | 2022-06-10 | 2023-11-24 | 中国石油化工股份有限公司 | 一种混合乙烯与氧气的混合器 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7200207A (es) * | 1972-01-06 | 1973-07-10 |
-
0
- BE BE795261D patent/BE795261A/xx unknown
-
1972
- 1972-02-10 US US00225259A patent/US3741166A/en not_active Expired - Lifetime
-
1973
- 1973-02-07 AU AU51896/73A patent/AU470905B2/en not_active Expired
- 1973-02-07 CA CA163,462A patent/CA969463A/en not_active Expired
- 1973-02-08 FR FR7304409A patent/FR2182841B1/fr not_active Expired
- 1973-02-08 NL NL7301777A patent/NL7301777A/xx not_active Application Discontinuation
- 1973-02-09 SE SE7301845A patent/SE382493B/xx unknown
- 1973-02-09 IT IT20193/73A patent/IT978949B/it active
- 1973-02-09 DE DE2306342A patent/DE2306342A1/de not_active Withdrawn
- 1973-02-09 FI FI389/73A patent/FI58014C/fi active
- 1973-02-09 GB GB658173A patent/GB1426091A/en not_active Expired
- 1973-02-09 CH CH188773A patent/CH577660A5/xx not_active IP Right Cessation
- 1973-02-09 NO NO534/73A patent/NO135606C/no unknown
- 1973-02-10 ES ES411507A patent/ES411507A1/es not_active Expired
- 1973-02-10 JP JP48016987A patent/JPS4889426A/ja active Pending
-
1981
- 1981-05-26 JP JP1981076438U patent/JPS57150313U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE795261A (fr) | 1973-05-29 |
| AU5189673A (en) | 1974-08-08 |
| JPS4889426A (es) | 1973-11-22 |
| FR2182841B1 (es) | 1975-01-03 |
| IT978949B (it) | 1974-09-20 |
| JPS57150313U (es) | 1982-09-21 |
| NO135606C (es) | 1977-04-27 |
| FI58014C (fi) | 1981-12-28 |
| SE382493B (sv) | 1976-02-02 |
| CA969463A (en) | 1975-06-17 |
| FI58014B (fi) | 1980-07-31 |
| FR2182841A1 (es) | 1973-12-14 |
| DE2306342A1 (de) | 1973-08-16 |
| NL7301777A (es) | 1973-08-14 |
| ES411507A1 (es) | 1976-01-01 |
| CH577660A5 (es) | 1976-07-15 |
| AU470905B2 (en) | 1976-04-01 |
| US3741166A (en) | 1973-06-26 |
| GB1426091A (en) | 1976-02-25 |
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