ES2040521T3 - Grupo de fusion con precalentador de la carga en forma de pozo. - Google Patents
Grupo de fusion con precalentador de la carga en forma de pozo.Info
- Publication number
- ES2040521T3 ES2040521T3 ES90103897T ES90103897T ES2040521T3 ES 2040521 T3 ES2040521 T3 ES 2040521T3 ES 90103897 T ES90103897 T ES 90103897T ES 90103897 T ES90103897 T ES 90103897T ES 2040521 T3 ES2040521 T3 ES 2040521T3
- Authority
- ES
- Spain
- Prior art keywords
- shaft
- furnace
- charging material
- pct
- vessel
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
- F27B3/10—Details, accessories, or equipment peculiar to hearth-type furnaces
- F27B3/18—Arrangements of devices for charging
- F27B3/183—Charging of arc furnaces vertically through the roof, e.g. in three points
- F27B3/186—Charging in a vertical chamber adjacent to the melting chamber
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/06—Crucible or pot furnaces heated electrically, e.g. induction crucible furnaces with or without any other source of heat
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/5211—Manufacture of steel in electric furnaces in an alternating current [AC] electric arc furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/56—Manufacture of steel by other methods
- C21C5/562—Manufacture of steel by other methods starting from scrap
- C21C5/565—Preheating of scrap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
- F27D13/002—Preheating scrap
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Details (AREA)
- Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
- Processing Of Solid Wastes (AREA)
- Tunnel Furnaces (AREA)
- Forging (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Heat Treatment Of Articles (AREA)
- Ink Jet (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
- Thermotherapy And Cooling Therapy Devices (AREA)
Abstract
EN UN APARATO DE FUNDICION CON UN HORNO (1) DE ARCO ELECTRICO Y UN PRECALENTADOR (2) DE CARGA EN FORMA DE CAMISA DISPUESTA LATERALMENTE CON RESPECTO AL HORNO DE ARCO ELECTRICO, LAS PAREDES EXTERIORES DE LOS PRECALENTADORES (2) DE CARGA Y LAS PAREDES SUPERIORES Y PAREDES INFERIORES DE LA PARED DE LA CUBETA (5) SE FORMAN CAMISAS FIJADAS (10) EN CONSTRUCCIONES (27) DE SUSTENTACION. A TRAVES DE UN MOVIMIENTO RELATIVO HORIZONTAL ENTRE LA CUBETA (3) DEL HORNO Y LA CONSTRUCCION (27) DE SUJECCION, JUNTAMENTE CON LA CUBIERTA (6) DE LA CUBETA, LA MATERIA DE CARGA PUEDE CARGARSE EN JAULA DE CHATARRA SIN NINGUN IMPEDIMENTO DESDE LA CAMISA HASTA LA CUBETA DEL HORNO O MEDIANTE LA CAMISA DEL HORNO ATRAVESANDO DIFERENTES ZONAS DE LA CUBETA (3) DEL HORNO. MEDIANTE UN BLOQUEADOR EN LA CAMISA SE RETIENE LA MATERIA DE CARGA GRUESO MIENTRAS TANTO SE CALIENTA LA FASE DE GRANO FINO.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3906653A DE3906653A1 (de) | 1989-03-02 | 1989-03-02 | Einschmelzaggregat mit schachtfoermigem chargiergutvorwaermer |
DE3940558A DE3940558A1 (de) | 1989-12-07 | 1989-12-07 | Verfahren zum betrieb eines lichtbogenofens und lichtbogenofen |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2040521T3 true ES2040521T3 (es) | 1993-10-16 |
Family
ID=25878367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES90103897T Expired - Lifetime ES2040521T3 (es) | 1989-03-02 | 1990-02-28 | Grupo de fusion con precalentador de la carga en forma de pozo. |
Country Status (21)
Country | Link |
---|---|
US (1) | US5153894A (es) |
EP (1) | EP0385434B1 (es) |
JP (1) | JPH0646145B2 (es) |
KR (1) | KR0136860B1 (es) |
CN (1) | CN1025069C (es) |
AT (1) | ATE89324T1 (es) |
AU (1) | AU621207B2 (es) |
BR (1) | BR9005588A (es) |
CA (1) | CA2028108C (es) |
DE (1) | DE59001390D1 (es) |
DK (1) | DK0385434T3 (es) |
ES (1) | ES2040521T3 (es) |
FI (1) | FI92335C (es) |
GE (1) | GEP19970772B (es) |
HU (1) | HU209757B (es) |
MX (1) | MX172934B (es) |
PT (1) | PT93316B (es) |
RU (1) | RU1838737C (es) |
TR (1) | TR24157A (es) |
UA (1) | UA19770A (es) |
WO (1) | WO1990010086A2 (es) |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4006281A1 (de) * | 1990-02-28 | 1991-08-29 | Fuchs Technology Ag | Metallurgisches aggregat |
US5471495A (en) * | 1991-11-18 | 1995-11-28 | Voest-Alpine Industrieanlagenbeau Gmbh | Electric arc furnace arrangement for producing steel |
DE4138120A1 (de) * | 1991-11-19 | 1993-05-27 | Fuchs Technology Ag | Einschmelzaggregat mit ofenwiege |
DE4138118A1 (de) * | 1991-11-19 | 1993-05-27 | Fuchs Systemtechnik Gmbh | Verfahren und vorrichtung zur stahlherstellung aus metallischem einsatzmaterial |
DE4240667C2 (de) * | 1992-11-24 | 1996-05-09 | Mannesmann Ag | Stahlwerksanlage mit einem an einem ringförmigen Tragelement befestigten metallurgischen Gefäß |
JPH07190629A (ja) * | 1993-04-15 | 1995-07-28 | Ishikawajima Harima Heavy Ind Co Ltd | スクラップ原料予熱装入装置 |
DE4326369A1 (de) * | 1993-08-05 | 1995-02-09 | Fuchs Systemtechnik Gmbh | Chargiergutvorwärmer |
DE4332913A1 (de) * | 1993-09-23 | 1995-03-30 | Mannesmann Ag | Stahlwerkseinrichtung mit geschlossenem kippbarem Lichtbogenofen |
JPH07145420A (ja) * | 1993-09-30 | 1995-06-06 | Ishikawajima Harima Heavy Ind Co Ltd | 電気アーク溶解炉 |
LU88517A7 (fr) * | 1993-12-15 | 1996-02-01 | Wurth Paul Sa | Dispositif de chargement d'un four électrique |
US5426664A (en) * | 1994-02-08 | 1995-06-20 | Nu-Core, Inc. | Water cooled copper panel for a furnace and method of manufacturing same |
JP2861794B2 (ja) * | 1994-03-18 | 1999-02-24 | 日本鋼管株式会社 | 原材料予熱槽を備えた溶解炉 |
DE4424324A1 (de) * | 1994-07-11 | 1996-01-18 | Fuchs Technology Ag | Verfahren und Vorrichtung zum Einschmelzen von Kunststoffe enthaltendem Schrott |
DE4445783A1 (de) * | 1994-12-21 | 1996-06-27 | Fuchs Technology Ag | Kippbares metallurgisches Aggregat |
AT404841B (de) * | 1995-04-10 | 1999-03-25 | Voest Alpine Ind Anlagen | Anlage und verfahren zum herstellen von eisenschmelzen |
JP3419950B2 (ja) * | 1995-04-14 | 2003-06-23 | 新日本製鐵株式会社 | アーク炉の予熱装置 |
DE19634348A1 (de) | 1996-08-23 | 1998-02-26 | Arcmet Tech Gmbh | Einschmelzaggregat mit einem Lichtbogenofen |
ID22749A (id) * | 1997-03-26 | 1999-12-09 | Daniel & C Ohg S P A | Keranjang dingin untuk instalasi baja |
LU90141B1 (de) * | 1997-09-30 | 1999-03-31 | Wurth Paul Sa | Chargiergutvorwaermer |
US6024912A (en) * | 1997-11-27 | 2000-02-15 | Empco (Canada) Ltd. | Apparatus and process system for preheating of steel scrap for melting metallurgical furnaces with concurrent flow of scrap and heating gases |
US6064687A (en) * | 1997-12-12 | 2000-05-16 | Emerging Technologies International, Llc | Mobile furnace facility |
DE19807616A1 (de) * | 1998-02-13 | 1999-08-26 | Mannesmann Ag | Beschickungseinrichtung für Niederschachtöfen |
DE19807590A1 (de) * | 1998-02-23 | 1999-08-26 | Arcmet Tech Gmbh | Chargiergutvorwärmer |
DE19823226A1 (de) | 1998-05-25 | 1999-12-02 | Arcmet Technologie Gmbh Linz | Kippbarer Lichtbogenofen |
EP1114973A4 (en) * | 1999-07-08 | 2004-12-29 | Jp Steel Plantech Co | APPARATUS AND METHOD FOR ARCTIC MELTING COLD RAW |
JP3766269B2 (ja) * | 2000-11-29 | 2006-04-12 | 東芝機械株式会社 | インゴット供給装置およびインゴット供給方法 |
JP5377808B2 (ja) * | 2001-05-28 | 2013-12-25 | 大同特殊鋼株式会社 | 予熱装置付きアーク炉 |
DE10355549A1 (de) * | 2003-11-27 | 2005-06-23 | Intracon Gmbh | Chargiergutvorwärmer |
US7426230B2 (en) * | 2005-01-25 | 2008-09-16 | Setsu Anzai | Sealed device for preventing exhaust gas leakage |
DE102010002523B4 (de) | 2009-03-18 | 2011-12-22 | Rafic Boulos Daou | Stahlerzeugungseinrichtung |
DE102009001646B3 (de) * | 2009-03-18 | 2010-07-22 | Daou, Rafic Boulos, Bdadoun | Stahlerzeugungseinrichtung |
JP2011033217A (ja) * | 2009-07-30 | 2011-02-17 | Jp Steel Plantech Co | アーク溶解設備及びアーク溶解設備を用いた溶湯の製造方法 |
EP2360282B1 (de) * | 2010-02-15 | 2012-12-12 | SMS Siemag Aktiengesellschaft | Elektrolichtbogenofen |
DE102010045951A1 (de) | 2010-09-21 | 2012-03-22 | Fuchs Technology Holding Ag | Vorrichtung und Verfahren zur kontinuierlichen Stahlerzeugung und metallurgischen Bearbeitung |
DE102010045948A1 (de) | 2010-09-21 | 2012-03-22 | Fuchs Technology Holding Ag | Einschmelzaggregat, insbesondere elektrischer Lichtbogenofen zur Stahlerzeugung |
DE102011075003C5 (de) | 2011-04-29 | 2017-06-01 | Primetals Technologies Germany Gmbh | Elektroschmelzofen |
EP2745066B1 (en) * | 2011-08-15 | 2018-02-28 | Consarc Corporation | Electric induction melting assembly |
CN103185463B (zh) * | 2011-12-27 | 2015-04-01 | 钢铁普蓝特克股份有限公司 | 电弧炉 |
EP2685192A1 (de) * | 2012-07-11 | 2014-01-15 | Siemens VAI Metals Technologies GmbH | Lichtbogenofen |
CN103471377A (zh) * | 2013-08-28 | 2013-12-25 | 锦州晶鑫冶金设备科技有限公司 | 一种升降移动式电极可调负压碳化硼精炼炉 |
DE102014115671A1 (de) * | 2014-10-28 | 2016-05-12 | Gerhard Fuchs | Schmelzvorrichtung und schmelzverfahren |
US9903653B2 (en) * | 2014-11-05 | 2018-02-27 | Daido Steel Co., Ltd. | Melting furnace |
JP6579314B2 (ja) * | 2014-11-05 | 2019-09-25 | 大同特殊鋼株式会社 | 溶解炉 |
US10215494B2 (en) | 2014-11-05 | 2019-02-26 | Daido Steel Co., Ltd. | Method of operating electric arc furnace |
US10234206B2 (en) | 2014-11-05 | 2019-03-19 | Daido Steel Co., Ltd. | Electric arc furnace |
JP6451224B2 (ja) | 2014-11-05 | 2019-01-16 | 大同特殊鋼株式会社 | 電気炉の操業方法 |
ES2906962T3 (es) | 2020-04-08 | 2022-04-21 | Badische Stahl Eng Gmbh | Dispositivo y procedimiento para el mantenimiento del orificio de colada de un horno de arco eléctrico |
CN111484045B (zh) * | 2020-04-23 | 2022-09-13 | 海城三岩矿业有限公司 | 一种电熔镁砂的多级重熔提纯方法 |
EP4177555A1 (de) | 2021-11-03 | 2023-05-10 | Badische Stahl-Engineering GmbH | Schlackentüranordnung und reinigungsverfahren |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE910418C (de) * | 1951-12-21 | 1954-05-03 | Demag Elektrometallurgie Gmbh | Elektroofen, insbesondere Lichtbogenofen, mit einem kippbaren Herd |
US2944100A (en) * | 1957-01-26 | 1960-07-05 | Demag Elektrometallurgie Gmbh | Tilting electrode furnace |
BE664254A (es) * | 1965-05-21 | 1965-09-16 | ||
US3441651A (en) * | 1966-02-23 | 1969-04-29 | Canadian Patents Dev | Method and apparatus for heat recovery in electric arc furnaces |
DE1804098A1 (de) * | 1967-10-23 | 1969-07-03 | Krupp Gmbh | Verfahren und Vorrichtung zur Vorwaermung von Schrott fuer Lichtbogenoefen |
FR1602675A (es) * | 1968-07-31 | 1971-01-11 | ||
JPS4845937A (es) * | 1971-10-08 | 1973-06-30 | ||
SE357818B (es) * | 1971-11-09 | 1973-07-09 | Asea Ab | |
FR2218397B1 (es) * | 1973-02-21 | 1976-05-14 | Siderurgie Fse Inst Rech | |
DE2309343C2 (de) * | 1973-02-24 | 1975-04-10 | Hawley Manufacturing Corp., Indianapolis, Ind. (V.St.A.) | Von oben beschickter Ofen, insbesondere Schmelzofen |
US3980801A (en) * | 1975-09-05 | 1976-09-14 | Whiting Corporation | Tilt and swing lock mechanism for electric furnace |
MX154705A (es) * | 1979-12-21 | 1987-12-02 | Korf Ikosa Ind Aco | Horno mejorado para fundir y afinar chatarras,hierro esponja,hierro crudo y hierro liquido para la produccion de acero |
US4328388A (en) * | 1980-02-11 | 1982-05-04 | Longenecker Levi S | Electro furnace feeding and furnace fume utilization and control |
JPS5758070A (en) * | 1980-09-25 | 1982-04-07 | Hitachi Plant Eng & Constr Co | Scrap melting surnace |
JPS5925139A (ja) * | 1982-07-30 | 1984-02-09 | 松下電工株式会社 | 4空隙型有極電磁石装置 |
JPS5956083A (ja) * | 1982-09-21 | 1984-03-31 | 石川島播磨重工業株式会社 | 製鋼用原料の予熱装置 |
JPS60177119A (ja) * | 1984-02-23 | 1985-09-11 | Nissei Kk | 鉄鋼溶解炉の操業方法 |
DE8412739U1 (de) * | 1984-04-25 | 1986-01-23 | Fuchs Systemtechnik GmbH, 7601 Willstätt | Lichtbogenofen mit Chargiergutvorwärmer |
DE3421485A1 (de) * | 1984-06-08 | 1985-12-12 | Fuchs Systemtechnik GmbH, 7601 Willstätt | Lichtbogenofen mit einem auf einer seite des ofengefaesses vorgesehenen aufnahmeraum fuer chargiergut |
EP0291680B2 (de) * | 1984-06-08 | 1995-03-01 | Fuchs Systemtechnik GmbH | Lichtbogenofen mit einem auf einer Seite des Ofengefässes vorgesehenen Aufnahmeraum für Chargiergut |
JPH0627637B2 (ja) * | 1984-12-03 | 1994-04-13 | 石川島播磨重工業株式会社 | 溶解製錬炉 |
US4653065A (en) * | 1985-02-08 | 1987-03-24 | Nippon Steel Corporation | Preheating mechanism for use with duplex electric-arc furnace system |
DE3514293A1 (de) * | 1985-04-19 | 1986-10-30 | Fuchs Systemtechnik GmbH, 7601 Willstätt | Hub- und schwenkvorrichtung fuer den deckel des ofengefaesses eines lichtbogenofens |
AT384669B (de) * | 1986-03-17 | 1987-12-28 | Voest Alpine Ag | Anlage zur herstellung von stahl aus schrott |
AT387350B (de) * | 1987-05-15 | 1989-01-10 | Voest Alpine Ag | Elektroofen, wie lichtbogenofen oder plasmaofen |
-
1990
- 1990-02-28 DE DE9090103897T patent/DE59001390D1/de not_active Expired - Lifetime
- 1990-02-28 BR BR9005588A patent/BR9005588A/pt not_active IP Right Cessation
- 1990-02-28 EP EP90103897A patent/EP0385434B1/de not_active Expired - Lifetime
- 1990-02-28 ES ES90103897T patent/ES2040521T3/es not_active Expired - Lifetime
- 1990-02-28 HU HU902311A patent/HU209757B/hu not_active IP Right Cessation
- 1990-02-28 US US07/613,479 patent/US5153894A/en not_active Expired - Lifetime
- 1990-02-28 CA CA 2028108 patent/CA2028108C/en not_active Expired - Lifetime
- 1990-02-28 JP JP50416490A patent/JPH0646145B2/ja not_active Expired - Lifetime
- 1990-02-28 WO PCT/EP1990/000335 patent/WO1990010086A2/de active IP Right Grant
- 1990-02-28 AU AU51805/90A patent/AU621207B2/en not_active Ceased
- 1990-02-28 AT AT90103897T patent/ATE89324T1/de not_active IP Right Cessation
- 1990-02-28 UA UA4831648A patent/UA19770A/uk unknown
- 1990-02-28 DK DK90103897T patent/DK0385434T3/da active
- 1990-03-01 PT PT93316A patent/PT93316B/pt not_active IP Right Cessation
- 1990-03-02 CN CN90101961A patent/CN1025069C/zh not_active Expired - Lifetime
- 1990-03-02 KR KR1019900002734A patent/KR0136860B1/ko not_active IP Right Cessation
- 1990-03-02 MX MX1975190A patent/MX172934B/es unknown
- 1990-04-02 TR TR26190A patent/TR24157A/xx unknown
- 1990-11-01 RU SU904831648A patent/RU1838737C/ru active
- 1990-11-01 FI FI905410A patent/FI92335C/fi not_active IP Right Cessation
-
1994
- 1994-09-27 GE GEAP19942216A patent/GEP19970772B/en unknown
Also Published As
Publication number | Publication date |
---|---|
AU5180590A (en) | 1990-09-26 |
WO1990010086A2 (de) | 1990-09-07 |
EP0385434A3 (en) | 1990-10-10 |
EP0385434A2 (de) | 1990-09-05 |
FI92335B (fi) | 1994-07-15 |
TR24157A (tr) | 1991-05-01 |
JPH03505625A (ja) | 1991-12-05 |
CN1025069C (zh) | 1994-06-15 |
EP0385434B1 (de) | 1993-05-12 |
FI92335C (fi) | 1994-10-25 |
FI905410A0 (fi) | 1990-11-01 |
AU621207B2 (en) | 1992-03-05 |
UA19770A (uk) | 1997-12-25 |
JPH0646145B2 (ja) | 1994-06-15 |
DE59001390D1 (de) | 1993-06-17 |
DK0385434T3 (da) | 1993-06-07 |
CA2028108C (en) | 1994-12-06 |
BR9005588A (pt) | 1991-08-06 |
US5153894A (en) | 1992-10-06 |
WO1990010086A3 (de) | 1990-10-18 |
KR0136860B1 (ko) | 1998-07-01 |
PT93316B (pt) | 1996-05-31 |
MX172934B (es) | 1994-01-24 |
HU209757B (en) | 1994-10-28 |
CN1045642A (zh) | 1990-09-26 |
RU1838737C (ru) | 1993-08-30 |
HUT56179A (en) | 1991-07-29 |
GEP19970772B (en) | 1997-06-13 |
KR900014845A (ko) | 1990-10-25 |
CA2028108A1 (en) | 1990-09-03 |
PT93316A (pt) | 1991-10-15 |
ATE89324T1 (de) | 1993-05-15 |
HU902311D0 (en) | 1991-05-28 |
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