BE750699A - Element d'echange de chaleur forme d'un materiau de faible conductibilite thermique et de faible solidite - Google Patents
Element d'echange de chaleur forme d'un materiau de faible conductibilite thermique et de faible soliditeInfo
- Publication number
- BE750699A BE750699A BE750699DA BE750699A BE 750699 A BE750699 A BE 750699A BE 750699D A BE750699D A BE 750699DA BE 750699 A BE750699 A BE 750699A
- Authority
- BE
- Belgium
- Prior art keywords
- low
- heat exchange
- exchange element
- thermal conductibility
- low thermal
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
- F28D7/1615—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium
- F28D7/1623—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation the conduits being inside a casing and extending at an angle to the longitudinal axis of the casing; the conduits crossing the conduit for the other heat exchange medium with particular pattern of flow of the heat exchange media, e.g. change of flow direction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0041—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for only one medium being tubes having parts touching each other or tubes assembled in panel form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/14—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally
- F28F1/22—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending longitudinally the means having portions engaging further tubular elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
- F28F21/062—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing tubular conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/08—Arrangements for sealing elements into header boxes or end plates by dismountable joints by wedge-type connections, e.g. taper ferrule
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/4935—Heat exchanger or boiler making
- Y10T29/49377—Tube with heat transfer means
- Y10T29/49378—Finned tube
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Connection Of Plates (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691926187 DE1926187A1 (de) | 1969-05-22 | 1969-05-22 | Waermeaustauschelement aus Werkstoffen mit geringer Waermeleitfaehigkeit und Festigkeit |
DE19691937783 DE1937783B2 (de) | 1969-05-22 | 1969-07-25 | Waermeaustauschelement fuer trennwand-waermeaustauscher |
DE19691948407 DE1948407A1 (de) | 1969-05-22 | 1969-09-25 | Waermeaustauschelement aus Werkstoffen mit geringer Waermeleitfaehigkeit und Festigkeit |
Publications (1)
Publication Number | Publication Date |
---|---|
BE750699A true BE750699A (fr) | 1970-11-23 |
Family
ID=27181942
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE750699D BE750699A (fr) | 1969-05-22 | 1970-05-21 | Element d'echange de chaleur forme d'un materiau de faible conductibilite thermique et de faible solidite |
Country Status (12)
Country | Link |
---|---|
US (1) | US3648768A (de) |
JP (1) | JPS4930180B1 (de) |
BE (1) | BE750699A (de) |
BG (1) | BG20404A3 (de) |
CH (1) | CH517281A (de) |
CS (1) | CS174119B2 (de) |
DE (3) | DE1926187A1 (de) |
FR (1) | FR2043609B1 (de) |
GB (1) | GB1311998A (de) |
NL (1) | NL7005449A (de) |
RO (1) | RO61351A (de) |
YU (1) | YU33418B (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5018959A (en) * | 1988-07-05 | 1991-05-28 | Uponor N.V. | Device for producing a grate construction and a grate construction |
Families Citing this family (78)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4098331A (en) * | 1974-10-07 | 1978-07-04 | Fafco, Incorporated | Solar heat exchange panel and method of fabrication |
DE2454086C3 (de) * | 1974-11-14 | 1981-07-16 | Liebherr-Verzahntechnik Gmbh, 8960 Kempten | Zuführeinrichtung für Werkstücke |
DE2528267A1 (de) * | 1975-06-25 | 1977-01-20 | Buderus Eisenwerk | Vorrichtung zur uebertragung von sonnenenergie an ein fluessiges medium |
FR2329962A1 (fr) * | 1975-11-03 | 1977-05-27 | Applimo Applic Thermo Elec | Echangeur de chaleur pour fluides gazeux |
DE2618827A1 (de) * | 1976-04-29 | 1977-11-17 | Bruno Riech | Sonnenkollektor |
FR2362358A1 (fr) * | 1976-08-18 | 1978-03-17 | Hamon Sobelco Sa | Echangeur de chaleur a paroi d'echange formee par des tubes souples |
US4043015A (en) * | 1976-08-18 | 1977-08-23 | Brazeway, Inc. | Method of forming a header assembly |
JPS54101539A (en) * | 1978-01-27 | 1979-08-10 | Kobe Steel Ltd | Heat exchange pipe for use with water-sprinkling type, panel-shaped, liquefied natural gas evaporator and combination of such pipes and their manufacturing method |
CH625611A5 (de) * | 1978-03-15 | 1981-09-30 | Sulzer Ag | |
US4178909A (en) * | 1978-05-01 | 1979-12-18 | Reynolds Metals Company | Solar collector |
FR2441821A1 (fr) * | 1978-11-15 | 1980-06-13 | Collard Et A Trolart Sa G | Echangeur thermique de securite |
US4381764A (en) * | 1980-03-20 | 1983-05-03 | Warren Wojcik | Solar panel |
FR2481433B1 (fr) * | 1980-04-24 | 1985-06-28 | Armines | Echangeur thermique a tube souple |
US4341346A (en) * | 1980-07-30 | 1982-07-27 | Alcan Aluminium (U.K.) Ltd. | Radiators for use in hot water central heating systems |
US4414960A (en) * | 1982-05-10 | 1983-11-15 | Insolar, Inc. | Solar collection mat element |
JPS59186621A (ja) * | 1983-04-05 | 1984-10-23 | Ngk Insulators Ltd | 多孔体 |
USRE33013E (en) * | 1983-04-05 | 1989-08-08 | Ngk Insulators, Ltd. | Multi-channel body |
GB2158215A (en) * | 1984-04-26 | 1985-11-06 | Fook Chong Chai | Cooling plant |
DE3512874C2 (de) * | 1984-05-17 | 1995-04-20 | Heidenau Netz & Seil Veb | Flexibles Wärmeübertragungselement |
EP0168558B1 (de) * | 1984-07-18 | 1990-01-31 | Akzo Patente GmbH | Verfahren und Vorrichtung zum Herstellen von Wärme- und/oder Stoffaustauschern, die Rohre enthalten |
NO155069C (no) * | 1984-10-17 | 1987-02-04 | Norsk Hydro As | Hulprofil, dens anvendelse i varmevekslere og fremgangsmaate ved fremstilling. |
US4603731A (en) * | 1984-11-21 | 1986-08-05 | Ga Technologies Inc. | Graphite fiber thermal radiator |
FR2592468A1 (fr) * | 1985-12-26 | 1987-07-03 | Moureau Georges | Echangeur pour concentration de solutions et liquides divers |
US4832119A (en) * | 1986-06-05 | 1989-05-23 | Bloor Trevor J | Multi-tube heat exchanger and connectors therefor |
FR2665510B1 (fr) * | 1990-08-03 | 1992-12-04 | Fondeur Francois | Procede de raccordement etanche et raccord etanche correspondant. |
DE4033373C2 (de) * | 1990-10-18 | 1996-04-25 | Mannesmann Ag | Laufkatze |
DE4122400B4 (de) * | 1990-10-18 | 2004-04-15 | Siemens Ag | Laufkatze |
GB9211413D0 (en) * | 1992-05-29 | 1992-07-15 | Cesaroni Anthony Joseph | Panel heat exchanger formed from tubes and sheets |
JPH06117790A (ja) * | 1992-10-06 | 1994-04-28 | Sanden Corp | 熱交換器 |
JPH0755384A (ja) * | 1993-08-19 | 1995-03-03 | Sanden Corp | 多管式熱交換器 |
JPH07310992A (ja) * | 1994-05-16 | 1995-11-28 | Sanden Corp | 多管式熱交換器 |
FI106983B (fi) * | 1997-01-20 | 2001-05-15 | Hadwaco Ltd Oy | Kalvohaihduttimen tai -tislaimen lämmönsiirtoelementti ja sen valmistusmenetelmä |
FR2785375B1 (fr) * | 1998-10-28 | 2001-01-12 | Valeo Thermique Moteur Sa | Echangeur de chaleur a faisceau de tubes et collecteurs en materiau thermoplastique |
US6364008B1 (en) | 1999-01-22 | 2002-04-02 | E. I. Du Pont De Nemours And Company | Heat exchanger with tube plates |
WO2000079206A1 (en) * | 1999-06-22 | 2000-12-28 | Dupont Canada Inc. | Heat exchanger formed from tubes joined by simultaneous extrusion thermal bonding |
SE518089C2 (sv) * | 1999-10-26 | 2002-08-27 | Tetra Laval Holdings & Finance | Anordning vid en tubvärmeväxlare |
US6302197B1 (en) * | 1999-12-22 | 2001-10-16 | Isteon Global Technologies, Inc. | Louvered plastic heat exchanger |
KR100363969B1 (ko) * | 2000-02-11 | 2002-12-11 | 엘지전자 주식회사 | 냉장고용 증발기 및 헤더 제작 방법 |
FR2810731B1 (fr) * | 2000-06-21 | 2003-09-26 | Valeo Thermique Moteur Sa | Echangeur de chaleur a tubes souples en matiere plastique, notamment pour vehicule automobile |
GB0107107D0 (en) | 2001-03-21 | 2001-05-09 | Dwyer Robert C | Fluid to gas exchangers |
WO2002075220A1 (en) * | 2001-03-21 | 2002-09-26 | Robert Charles Dwyer | Air treatment units |
US6787116B2 (en) | 2001-05-02 | 2004-09-07 | Aquatherm Industries, Inc. | Overmolding insert for heat exchanger, process for manufacturing a heat exchanger, and heat exchanger produced thereby |
US6878334B2 (en) * | 2001-08-14 | 2005-04-12 | Carrier Corporation | Condensing heat exchanger formed of norbornene polymer |
US20030070752A1 (en) * | 2001-09-27 | 2003-04-17 | Kevin Bergevin | Method of manufacture for fluid handling barrier ribbon with polymeric tubes |
US6742576B2 (en) | 2001-09-27 | 2004-06-01 | E. I. Du Pont De Nemours And Company | Heat exchanger barrier ribbon with polymeric tubes |
US20030070751A1 (en) * | 2001-09-27 | 2003-04-17 | Kevin Bergevin | Method of manufacture for fluid handling polymeric barrier tube |
CA2409900C (en) * | 2002-10-29 | 2005-02-08 | Global Industries Holdings Ltd. | Flat water hose and hose connectors for flat water hose |
JP4180359B2 (ja) * | 2002-11-29 | 2008-11-12 | カルソニックカンセイ株式会社 | 熱交換器 |
KR20040080830A (ko) * | 2003-03-13 | 2004-09-20 | 엘지전자 주식회사 | 핀-관 일체형 열교환기 및 그 제조방법 |
US7048037B2 (en) * | 2003-12-09 | 2006-05-23 | Mcnair Edward F | Geothermal heating and/or cooling apparatus and method of using same |
GR1004729B (el) * | 2004-01-02 | 2004-11-22 | Κωνσταντινος Σπυριδωνα Τραβασαρος | Θερμαντικο σωμα με χαλκινο υδροσκελετο συγκολλημενο με φυλλα αλουμινιου με δεσμη λειζερ. |
US6997248B2 (en) * | 2004-05-19 | 2006-02-14 | Outokumpu Oyj | High pressure high temperature charge air cooler |
US20090025921A1 (en) * | 2005-09-27 | 2009-01-29 | Uponor Innovation Ab | Capillary Tube System |
US20070175468A1 (en) * | 2006-02-01 | 2007-08-02 | Vaughan William J Iv | Systems and apparatuses for solar water heating |
JP5216759B2 (ja) | 2006-04-04 | 2013-06-19 | エフィシャント・エナジー・ゲゼルシャフト・ミット・ベシュレンクテル・ハフツング | ヒートポンプ |
US20080271874A1 (en) * | 2007-05-04 | 2008-11-06 | John Gietzen | Thermal energy exchanger |
US20080283046A1 (en) * | 2007-05-14 | 2008-11-20 | Chung Fu Hsu | Solar collector having integral structure |
US8191617B2 (en) * | 2007-08-07 | 2012-06-05 | General Electric Company | Syngas cooler and cooling tube for use in a syngas cooler |
US8240366B2 (en) * | 2007-08-07 | 2012-08-14 | General Electric Company | Radiant coolers and methods for assembling same |
US8333013B2 (en) * | 2008-10-07 | 2012-12-18 | Delphi Technologies, Inc | Continuous manufacturing process for metal-plastic hybrid heat exchanger |
US8893714B2 (en) * | 2009-02-12 | 2014-11-25 | Babcock Power Services, Inc. | Expansion joints for panels in solar boilers |
US8261567B2 (en) * | 2009-06-23 | 2012-09-11 | Hussmann Corporation | Heat exchanger coil with wing tube profile for a refrigerated merchandiser |
US20110308228A1 (en) * | 2010-06-18 | 2011-12-22 | General Electric Company | Fin and Tube Heat Exchanger |
US20130025819A1 (en) * | 2011-07-25 | 2013-01-31 | Tai-Her Yang | Close-loop temperature equalization device having single-flowpath heat releasing device |
DE102012005513A1 (de) * | 2012-03-19 | 2013-09-19 | Bundy Refrigeration Gmbh | Wärmetauscher, Verfahren zu seiner Herstellung sowie verschiedene Anlagen mit einem derartigen Wärmetauscher |
US9227353B2 (en) * | 2012-11-08 | 2016-01-05 | Solar Hydronics Corporation | Molding apparatus and method for operating same |
US10072901B2 (en) * | 2013-06-28 | 2018-09-11 | Schneider Electric It Corporation | Indirect evaporator cooler heat exchanger manufacturing method |
FR3028018B1 (fr) * | 2014-11-04 | 2019-03-22 | Valeo Systemes Thermiques | Element d'echange de chaleur adapte pour un echange de chaleur entre un premier et un deuxieme fluide, un faisceau d'echange comprenant l'element d'echange de chaleur et un echangeur de chaleur comprenant le faisceau d'echange |
US20170045309A1 (en) * | 2015-08-11 | 2017-02-16 | Hamilton Sundstrand Corporation | High temperature flow manifold |
AT518986B1 (de) | 2016-10-07 | 2018-03-15 | Dipl Ing Thomas Euler Rolle | Wärmetauscher |
US11662148B2 (en) * | 2017-08-03 | 2023-05-30 | Mitsubishi Electric Corporation | Heat exchanger and refrigeration cycle apparatus |
CN109780893A (zh) * | 2017-11-10 | 2019-05-21 | 王晋声 | 一种金属翅片换热单元及应用其的换热器 |
CN108645265A (zh) * | 2018-05-17 | 2018-10-12 | 广东美的制冷设备有限公司 | 管翅单体和具有其的换热器、空调器 |
CN108534395A (zh) * | 2018-05-17 | 2018-09-14 | 广东美的制冷设备有限公司 | 换热器和具有其的空调器 |
CN108562176A (zh) * | 2018-05-18 | 2018-09-21 | 广东美的制冷设备有限公司 | 换热器及换热设备 |
CN108592654A (zh) * | 2018-05-18 | 2018-09-28 | 广东美的制冷设备有限公司 | 换热器及换热设备 |
CN111220007A (zh) * | 2019-11-29 | 2020-06-02 | 四川金象赛瑞化工股份有限公司 | 换热板、换热器及其应用、洗涤冷却塔 |
US11230964B2 (en) * | 2020-04-20 | 2022-01-25 | Caterpillar Inc. | Machine system having cooler with pack seal and header assembly for same |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2804284A (en) * | 1953-04-03 | 1957-08-27 | Griscom Russell Co | Heat exchanger |
US2788543A (en) * | 1954-07-28 | 1957-04-16 | Plastex Company | Apparatus for producing plastic pipe |
US3132691A (en) * | 1959-02-06 | 1964-05-12 | Babcock & Wilcox Co | Heat exchanger construction and thermal shield therefor |
US3277959A (en) * | 1964-08-12 | 1966-10-11 | Du Pont | Plastic tube heat exchanger and process of making |
US3438432A (en) * | 1967-06-26 | 1969-04-15 | North American Rockwell | Plastic heat exchanger with anti-buoyancy means |
-
1969
- 1969-05-22 DE DE19691926187 patent/DE1926187A1/de active Pending
- 1969-07-25 DE DE19691937783 patent/DE1937783B2/de not_active Withdrawn
- 1969-09-25 DE DE19691948407 patent/DE1948407A1/de active Pending
-
1970
- 1970-04-09 CH CH528870A patent/CH517281A/de not_active IP Right Cessation
- 1970-04-15 NL NL7005449A patent/NL7005449A/xx unknown
- 1970-04-28 US US32659A patent/US3648768A/en not_active Expired - Lifetime
- 1970-04-30 GB GB2075670A patent/GB1311998A/en not_active Expired
- 1970-05-15 YU YU01248/70A patent/YU33418B/xx unknown
- 1970-05-19 JP JP45042795A patent/JPS4930180B1/ja active Pending
- 1970-05-21 BE BE750699D patent/BE750699A/xx unknown
- 1970-05-21 FR FR7018408A patent/FR2043609B1/fr not_active Expired
- 1970-05-22 RO RO63427A patent/RO61351A/ro unknown
- 1970-05-22 CS CS3596A patent/CS174119B2/cs unknown
- 1970-05-22 BG BG14760A patent/BG20404A3/xx unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5018959A (en) * | 1988-07-05 | 1991-05-28 | Uponor N.V. | Device for producing a grate construction and a grate construction |
Also Published As
Publication number | Publication date |
---|---|
YU124870A (en) | 1976-06-30 |
JPS4930180B1 (de) | 1974-08-10 |
DE1937783A1 (de) | 1971-02-04 |
FR2043609B1 (de) | 1974-02-01 |
US3648768B1 (de) | 1983-10-18 |
DE1948407A1 (de) | 1971-04-08 |
BG20404A3 (de) | 1975-11-05 |
FR2043609A1 (de) | 1971-02-19 |
DE1926187A1 (de) | 1970-11-26 |
RO61351A (de) | 1977-01-15 |
DE1937783B2 (de) | 1977-12-29 |
NL7005449A (de) | 1970-11-24 |
YU33418B (en) | 1976-12-31 |
CH517281A (de) | 1971-12-31 |
GB1311998A (en) | 1973-03-28 |
CS174119B2 (de) | 1977-03-31 |
US3648768A (en) | 1972-03-14 |
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