DE3766534D1 - Verfahren und system zum anreichern von wasser mit sauerstoff. - Google Patents
Verfahren und system zum anreichern von wasser mit sauerstoff.Info
- Publication number
- DE3766534D1 DE3766534D1 DE8787302980T DE3766534T DE3766534D1 DE 3766534 D1 DE3766534 D1 DE 3766534D1 DE 8787302980 T DE8787302980 T DE 8787302980T DE 3766534 T DE3766534 T DE 3766534T DE 3766534 D1 DE3766534 D1 DE 3766534D1
- Authority
- DE
- Germany
- Prior art keywords
- oxygen
- enriching water
- enriching
- water
- 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 - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1289—Aeration by saturation under super-atmospheric pressure
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/09—Mixing systems, i.e. flow charts or diagrams for components having more than two different of undetermined agglomeration states, e.g. supercritical states
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/29—Mixing systems, i.e. flow charts or diagrams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/40—Mixing liquids with liquids; Emulsifying
- B01F23/45—Mixing liquids with liquids; Emulsifying using flow mixing
- B01F23/454—Mixing liquids with liquids; Emulsifying using flow mixing by injecting a mixture of liquid and gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
- B01F25/3124—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow
- B01F25/31242—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof characterised by the place of introduction of the main flow the main flow being injected in the central area of the venturi, creating an aspiration in the circumferential part of the conduit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/50—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F25/53—Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle in which the mixture is discharged from and reintroduced into a receptacle through a recirculation tube, into which an additional component is introduced
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/006—Regulation methods for biological treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1278—Provisions for mixing or aeration of the mixed liquor
- C02F3/1294—"Venturi" aeration means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/237—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media
- B01F23/2376—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids characterised by the physical or chemical properties of gases or vapours introduced in the liquid media characterised by the gas being introduced
- B01F23/23761—Aerating, i.e. introducing oxygen containing gas in liquids
- B01F23/237612—Oxygen
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
- B01F25/30—Injector mixers
- B01F25/31—Injector mixers in conduits or tubes through which the main component flows
- B01F25/312—Injector mixers in conduits or tubes through which the main component flows with Venturi elements; Details thereof
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/849,220 US4664680A (en) | 1986-04-07 | 1986-04-07 | Method and system for enriching oxygen content of water |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3766534D1 true DE3766534D1 (de) | 1991-01-17 |
Family
ID=25305340
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8787302980T Expired - Fee Related DE3766534D1 (de) | 1986-04-07 | 1987-04-06 | Verfahren und system zum anreichern von wasser mit sauerstoff. |
Country Status (9)
Country | Link |
---|---|
US (1) | US4664680A (de) |
EP (1) | EP0244954B1 (de) |
JP (1) | JPS62277130A (de) |
CA (1) | CA1299778C (de) |
DE (1) | DE3766534D1 (de) |
DK (1) | DK164723C (de) |
ES (1) | ES2018544B3 (de) |
IL (1) | IL82063A (de) |
NO (1) | NO165371C (de) |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4874509A (en) * | 1987-04-24 | 1989-10-17 | Donald Bullock | Oxidation saturation device |
US4965022A (en) * | 1987-07-01 | 1990-10-23 | Union Carbide Industrial Gases Technology Corporation | Process for dissolving a gas in a liquid |
JPH0759320B2 (ja) * | 1988-10-13 | 1995-06-28 | 海洋工業株式会社 | 大量水の溶存酸素量改善装置 |
JPH0295598U (de) * | 1989-01-10 | 1990-07-30 | ||
US6344489B1 (en) | 1991-02-14 | 2002-02-05 | Wayne State University | Stabilized gas-enriched and gas-supersaturated liquids |
US5569180A (en) * | 1991-02-14 | 1996-10-29 | Wayne State University | Method for delivering a gas-supersaturated fluid to a gas-depleted site and use thereof |
US5411660A (en) * | 1992-11-06 | 1995-05-02 | Envirex Inc. | Apparatus for dissolving gas in liquid including pressurized bubble contactor in sidestream |
US6315942B1 (en) | 1993-11-15 | 2001-11-13 | Wayne State University | System for delivery of gas-enriched fluids |
US6676900B1 (en) | 1994-12-09 | 2004-01-13 | Therox, Inc. | Method for the preparation and delivery of gas-enriched fluids |
US6607698B1 (en) | 1997-08-15 | 2003-08-19 | Therox, Inc. | Method for generalized extracorporeal support |
GB9603747D0 (en) * | 1996-02-22 | 1996-04-24 | Bingham Ian M | Treatment of liquors |
US5834519A (en) * | 1996-10-11 | 1998-11-10 | Wayne State University | Stabilized gas-supersaturated emulsions and suspensions |
CA2286653A1 (en) * | 1997-04-16 | 1998-10-22 | Wayne State University | System and method for delivery of gas-supersaturated fluids |
US6702949B2 (en) | 1997-10-24 | 2004-03-09 | Microdiffusion, Inc. | Diffuser/emulsifier for aquaculture applications |
US6386751B1 (en) * | 1997-10-24 | 2002-05-14 | Diffusion Dynamics, Inc. | Diffuser/emulsifier |
US7654728B2 (en) * | 1997-10-24 | 2010-02-02 | Revalesio Corporation | System and method for therapeutic application of dissolved oxygen |
US7128278B2 (en) * | 1997-10-24 | 2006-10-31 | Microdiffusion, Inc. | System and method for irritating with aerated water |
US6120008A (en) * | 1998-04-28 | 2000-09-19 | Life International Products, Inc. | Oxygenating apparatus, method for oxygenating a liquid therewith, and applications thereof |
US6602467B1 (en) | 1998-07-24 | 2003-08-05 | Therox, Inc. | Apparatus and method for blood oxygenation |
EP1100560B1 (de) * | 1998-07-24 | 2008-01-16 | TherOx, Inc. | Medizinische vorrichtung für die herstellung und abgabe einer mit gas angereicherten flüssigkeit |
US6387324B1 (en) | 1999-09-30 | 2002-05-14 | Therox, Inc. | Apparatus and method for blood oxygenation |
US6759008B1 (en) | 1999-09-30 | 2004-07-06 | Therox, Inc. | Apparatus and method for blood oxygenation |
US6890482B2 (en) | 1999-09-30 | 2005-05-10 | Therox, Inc. | Apparatus for blood oxygenation |
US6530895B1 (en) | 2000-01-25 | 2003-03-11 | Life International Products, Inc. | Oxygenating apparatus, method for oxygenating a liquid therewith, and applications thereof |
US7008535B1 (en) | 2000-08-04 | 2006-03-07 | Wayne State University | Apparatus for oxygenating wastewater |
US6582387B2 (en) | 2001-03-20 | 2003-06-24 | Therox, Inc. | System for enriching a bodily fluid with a gas |
US6613280B2 (en) * | 2001-03-20 | 2003-09-02 | Therox, Inc. | Disposable cartridge for producing gas-enriched fluids |
JP4231249B2 (ja) * | 2002-07-01 | 2009-02-25 | 大成建設株式会社 | 高酸素水製造装置及び底質の浄化方法 |
EP2086668B1 (de) | 2006-10-25 | 2016-11-16 | Revalesio Corporation | Mischvorrichtung und verfahren |
US8609148B2 (en) | 2006-10-25 | 2013-12-17 | Revalesio Corporation | Methods of therapeutic treatment of eyes |
US8784897B2 (en) | 2006-10-25 | 2014-07-22 | Revalesio Corporation | Methods of therapeutic treatment of eyes |
AU2007349224B2 (en) | 2006-10-25 | 2014-04-03 | Revalesio Corporation | Methods of wound care and treatment |
EP2097107B1 (de) | 2006-10-25 | 2016-05-04 | Revalesio Corporation | Therapeutische behandlung der augen mit einer sauerstoffangereicherten lösung |
US8445546B2 (en) | 2006-10-25 | 2013-05-21 | Revalesio Corporation | Electrokinetically-altered fluids comprising charge-stabilized gas-containing nanostructures |
US8784898B2 (en) | 2006-10-25 | 2014-07-22 | Revalesio Corporation | Methods of wound care and treatment |
US9523090B2 (en) | 2007-10-25 | 2016-12-20 | Revalesio Corporation | Compositions and methods for treating inflammation |
US9745567B2 (en) | 2008-04-28 | 2017-08-29 | Revalesio Corporation | Compositions and methods for treating multiple sclerosis |
US10125359B2 (en) | 2007-10-25 | 2018-11-13 | Revalesio Corporation | Compositions and methods for treating inflammation |
US20090227018A1 (en) * | 2007-10-25 | 2009-09-10 | Revalesio Corporation | Compositions and methods for modulating cellular membrane-mediated intracellular signal transduction |
AP3164A (en) * | 2007-11-15 | 2015-03-31 | Maelgwyn Mineral Services Africa Pty Ltd | Removal of cyanide from aqueous streams |
JP5221978B2 (ja) * | 2008-02-20 | 2013-06-26 | パナソニック株式会社 | 生物育成用水の製造装置 |
CA2723215A1 (en) | 2008-05-01 | 2009-11-05 | Revalesio Corporation | Compositions and methods for treating digestive disorders |
US8815292B2 (en) | 2009-04-27 | 2014-08-26 | Revalesio Corporation | Compositions and methods for treating insulin resistance and diabetes mellitus |
CH701271A2 (fr) * | 2009-06-03 | 2010-12-15 | Hoppal R & D Sa | Dispositif de décontamination d'effluents aqueux par séparation de phases non miscibles et traitement germicide et/ou oxydant en vue de l'abattement de la DBO et/ou de la DCO. |
JP5569721B2 (ja) * | 2009-10-22 | 2014-08-13 | 株式会社大林組 | 石積み浄化堤の機能維持方法及びシステム |
CL2010000300A1 (es) * | 2010-03-30 | 2010-07-09 | Oxzo S A | Sisitema portatil para generar oxigeno para jaulas de peces en el mar que comprende un ponton, un sistema generador de oxigeno con 93-95% de pureza con generadores de aire y oxigeno a presion, medios de comprension y acumulacion de oxigeno a alta presion y un sistema de generacion y distruibucion de electricidad para generar oxigeno. |
CN104983740A (zh) | 2010-05-07 | 2015-10-21 | 利发利希奥公司 | 用于增强生理性能和恢复时间的组合物和方法 |
US8500104B2 (en) | 2010-06-07 | 2013-08-06 | James Richard Spears | Pressurized liquid stream with dissolved gas |
CA2808189A1 (en) | 2010-08-12 | 2012-02-16 | Revalesio Corporation | Compositions and methods for treatment of taupathy |
US8919744B1 (en) | 2011-08-10 | 2014-12-30 | The United States Of America As Represented By The Secretary Of Agriculture | Water aeration system and method |
EP2788110B1 (de) | 2011-12-08 | 2018-10-17 | Pentair Water Pool and Spa, Inc. | Aquakulturanlage und verfahren zum betreiben einer pumpe dafür |
EP2844377B1 (de) | 2012-05-01 | 2016-12-14 | TherOx, Inc. | System zur blasenfreien gasanreicherung einer strömenden flüssigkeit in einer leitung |
EP2969158A4 (de) | 2013-03-14 | 2016-12-21 | Pentair Water Pool & Spa Inc | Kohlendioxidregelungssystem für eine aquakultur |
US20140311974A1 (en) * | 2013-03-15 | 2014-10-23 | Robert W. Stiles, Jr. | Ammonia Control System for Aquaculture |
EP2967008A4 (de) * | 2013-03-15 | 2016-11-23 | Pentair Water Pool & Spa Inc | Regelungssystem von gelöstem sauerstoff für eine aquakultur |
WO2016050374A1 (en) * | 2014-09-29 | 2016-04-07 | Heimgård Bjørn Egil | Aeration system |
GB201608253D0 (en) | 2016-05-11 | 2016-06-22 | Oxy Solutions As | Aquaculture system |
US10933388B1 (en) | 2017-07-07 | 2021-03-02 | Jmf Watercraft Design Llc | H20-oxygenation method and oxygenated live well |
CA3086603A1 (en) * | 2017-12-21 | 2019-06-27 | Gis Gas Infusion Systems Inc. | Method and apparatus for fish farms |
CN108283155B (zh) * | 2018-02-05 | 2020-12-08 | 水利部交通运输部国家能源局南京水利科学研究院 | 一种槽式过饱和溶解气体流动水体生成装置 |
CN111264450A (zh) * | 2020-03-30 | 2020-06-12 | 四川大学 | 动水条件下鱼类探知和垂向回避过饱和tdg行为研究方法和装置 |
US11921524B2 (en) * | 2020-04-14 | 2024-03-05 | Aeroseal, LLC | Autonomous concentration control systems and methods of controlling concentration of a gas or particle mixture |
NO346229B1 (en) * | 2020-06-23 | 2022-05-02 | Redox As | Device for addition of a liquid to water |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2253516A (en) * | 1938-08-11 | 1941-08-26 | James F Haldeman | Aerating and filtering device for aquariums |
US2521215A (en) * | 1946-07-01 | 1950-09-05 | Shawinigan Chem Ltd | Process of and apparatus for dispersing an aeriform body in a liquid body |
GB1144463A (en) * | 1965-09-28 | 1969-03-05 | Licencia Talalmanyokat | Flotation equipment |
GB1171664A (en) * | 1967-02-21 | 1969-11-26 | Dorr Oliver Inc | Treatment of polluted streams in place |
US3555783A (en) * | 1969-11-20 | 1971-01-19 | Environmental Service Inc | Process and apparatus for treating liquids and gases |
US3967937A (en) * | 1974-05-30 | 1976-07-06 | Phillips Petroleum Company | Absorption process method and apparatus |
US3956124A (en) * | 1974-11-25 | 1976-05-11 | Union Carbide Corporation | Hypolimnion oxygenation |
FR2321930A1 (fr) * | 1975-08-25 | 1977-03-25 | Cem Comp Electro Mec | Procede et dispositif pour la mise en contact de gaz et de liquide |
US4023528A (en) * | 1975-11-24 | 1977-05-17 | Applegate Lyle C | Aerating means |
US4548712A (en) * | 1977-11-04 | 1985-10-22 | Reid John H | Conservation of momentum in a barrier oxidation ditch |
US4564480A (en) * | 1978-12-20 | 1986-01-14 | Eduard Kamelmacher | Aeration system and method |
US4207180A (en) * | 1979-01-11 | 1980-06-10 | Chang Shih Chih | Gas-liquid reaction method and apparatus |
JPS55114394A (en) * | 1979-02-24 | 1980-09-03 | Eiichi Sugiura | Water suction pipe air intake type vapor-liquid mixing pressure aerator for polluted water treatment |
-
1986
- 1986-04-07 US US06/849,220 patent/US4664680A/en not_active Expired - Fee Related
-
1987
- 1987-03-31 IL IL8206387A patent/IL82063A/xx unknown
- 1987-04-06 CA CA 533943 patent/CA1299778C/en not_active Expired - Fee Related
- 1987-04-06 EP EP87302980A patent/EP0244954B1/de not_active Expired - Lifetime
- 1987-04-06 NO NO871441A patent/NO165371C/no unknown
- 1987-04-06 ES ES87302980T patent/ES2018544B3/es not_active Expired - Lifetime
- 1987-04-06 DK DK174487A patent/DK164723C/da not_active IP Right Cessation
- 1987-04-06 DE DE8787302980T patent/DE3766534D1/de not_active Expired - Fee Related
- 1987-04-07 JP JP62085603A patent/JPS62277130A/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
IL82063A (en) | 1990-04-29 |
NO165371C (no) | 1991-02-06 |
DK174487A (da) | 1987-10-08 |
CA1299778C (en) | 1992-04-28 |
DK164723B (da) | 1992-08-10 |
IL82063A0 (en) | 1987-10-20 |
JPS62277130A (ja) | 1987-12-02 |
DK164723C (da) | 1992-12-28 |
DK174487D0 (da) | 1987-04-06 |
NO871441D0 (no) | 1987-04-06 |
ES2018544B3 (es) | 1991-04-16 |
EP0244954A1 (de) | 1987-11-11 |
US4664680A (en) | 1987-05-12 |
NO165371B (no) | 1990-10-29 |
NO871441L (no) | 1987-10-08 |
EP0244954B1 (de) | 1990-12-05 |
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