NO134666B - - Google Patents
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- Publication number
- NO134666B NO134666B NO4690/71A NO469071A NO134666B NO 134666 B NO134666 B NO 134666B NO 4690/71 A NO4690/71 A NO 4690/71A NO 469071 A NO469071 A NO 469071A NO 134666 B NO134666 B NO 134666B
- Authority
- NO
- Norway
- Prior art keywords
- core
- cable
- conductors
- jacket
- stated
- Prior art date
Links
- 239000004020 conductor Substances 0.000 claims description 15
- 239000013013 elastic material Substances 0.000 claims description 5
- 239000002826 coolant Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
- E04B2/7411—Details for fire protection
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/61—Connections for building structures in general of slab-shaped building elements with each other
- E04B1/6108—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together
- E04B1/612—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces
- E04B1/6145—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with recesses in both frontal surfaces co-operating with an additional connecting element
- E04B1/6158—Connections for building structures in general of slab-shaped building elements with each other the frontal surfaces of the slabs connected together by means between frontal surfaces with recesses in both frontal surfaces co-operating with an additional connecting element the connection made by formlocking
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/94—Protection against other undesired influences or dangers against fire
- E04B1/948—Fire-proof sealings or joints
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/7407—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts
- E04B2/7409—Removable non-load-bearing partitions; Partitions with a free upper edge assembled using frames with infill panels or coverings only; made-up of panels and a support structure incorporating posts special measures for sound or thermal insulation, including fire protection
- E04B2/7412—Posts or frame members specially adapted for reduced sound or heat transmission
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/10—Doors, windows, or like closures for special purposes; Border constructions therefor for protection against air-raid or other war-like action; for other protective purposes
- E06B5/16—Fireproof doors or similar closures; Adaptations of fixed constructions therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
- F16B12/20—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using clamps, clips, wedges, sliding bolts, or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/28—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for metal furniture parts
- F16B12/32—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for metal furniture parts using clamps, clips, wedges, sliding bolts, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Acoustics & Sound (AREA)
- Thermal Sciences (AREA)
- Building Environments (AREA)
- Special Wing (AREA)
- Load-Bearing And Curtain Walls (AREA)
- Securing Of Glass Panes Or The Like (AREA)
- Insulated Conductors (AREA)
Description
Elektrisk sterkstrømkabel.
Foreliggende oppfinnelse angår fluidum-kjølede elektriske kabler.
Slike kabler omfatter i alminnelighet en sentral hul ledende kjerne og en ytre rørformet del som omgir kjernen. Fluidum passerer gjennom rommet inne i den hule kjerne og også mellom den ytre del og kjernen. Slike kabler blir ofte brukt for strøm-tilførsel til elektriske ovner og må kunne føre store strømstyrker. Under bruk av slike kabler er det oppstått vanskeligheter ved at den indre overflate av den rørfor-mete del slites av den ytre overflate av kjernen. Denne slitasje skyldes i alminnelighet vibrering av kabelen under bruk, spesielt når frekvensen for den strøm kabelen fører er lav, f. eks. 25 per/sek.
Foreliggende oppfinnelse går ut på en fluidumkjølet kabel som omfatter en hul kjerne som består av flere lag som hvert består av flere nakne ledere. En ytre bøye-lig kappe omgir kjernen, og den indre overflate av kappen er skilt fra kjernen ved hjelp av en flerhet elastiske deler avvekslende med nakne ledere i det ytre lag av kjernen og slått sammen med disse. De elastiske deler virker som dempere, og de-res tversnitt er formet slik at det blir til-strekkelig mellomrom mellom kjernen og kappen til å hindre gnissing og til å tillate kjølemidlet å strømme mellom kjernen og kappen. Det har vist seg at denne kon-struksjon i høy grad fjerner de skadelige virkninger som skyldes bevegelser mellom elementene i kabelen. I en foretrukket ut-førelsesform av foreliggende oppfinnelse er de elastiske deler ledere, som er dekket med elastisk material og som er slått sammen med de nakne ledere i kjernen.
Oppfinnelsen skal nå beskrives under
henvisning til vedføyede tegninger.
Fig. 1 og 2 viser et lengdesnitt, henhv.
et sideriss av en fluidum-kabel hvor oppfinnelsen er bragt til utførelse. Fig. 3 viser et delsnitt etter linjen 3—3
i fig. 2.
På tegningen er det vist et parti av en kabel som har en hul ledende kjerne 1 som omfatter flere nakne ledere 2 som er slått sammen, en skruefjær 3 og en bøyelig flat del 4, begge inne i kjernen, en ytre bøyelig, væsketett metall-kappe 5, indre kanaler 6, 7 og ytre kanaler 8 hvor kjøle væsken kan flyte. Et slutt-stykke 10 kan være festet til enden av kabelen. En kabel av denne type er beskrevet i det kanadiske patent nr. 552 769.
Avvekslende med de nakne ledere 2 og slik at de er forankret til disse og i avstand fra hverandre, ligger deler 9 som består av ledere i likhet med lederne 2, men dekket med et slitesterkt elastisk material med lav friksjonskoeffisient, f. eks. polyetylen eller neopren og lagt slik at de holder den ytre kappe 5 i en viss avstand fra lederne 2. De-lene 9 kunne like godt bestå av bare elastisk material.
Da den indre overflate av kappen 5 og den ytre overflate av kjernen 1 er skilt ved hjelp av de dekkede ledere 9, vil muligheten være nedsatt for at det skal oppstå slitasje ved bevegelse eller vibrering i kabelen. Da den ytre kappe 5 og kjernen 1 i alminnelighet vibrerer i forskjellig grad, vil vibrerin-gen av den ytre kappe 5 bli så dempet at
enhver slitasje på grunn av dette forhold
vil bli nedsatt. Da lederne 9 er dekket med
et elastisk material vil disse ledere danne
puter ved utvidelse og sammentrekking av
kabelen.
Claims (4)
1. Elektrisk sterkstrømkabel som omfatter en ytre bøyelig kappe, en hul kjerne
som er omgitt av og skilt fra kappen, og omfatter flere ledere, og er innrettet til å kjøles ved hjelp av en strøm av kjølemiddel gjennom minst en del av det rom som om-gis av kjernen og gjennom rommet mellom kjernen og kappen, karakterisert v e d at det er anordnet flere elastiske deler som strekker seg i kabelens lengderetning og er slått sammen med noen av lederne i det ytre lag av kjernen og er innrettet til å ligge mot den indre overflate av kappen
for å skille kjernen fra kappen slik at det dannes kanaler for føring av kjølemiddel mellom kjernen og kappen.
2. Kabel som angitt i påstand 1, karakterisert ved at den ytre kappe er væsketett.
3. Kabel som angitt i påstand 1 og 2, karakterisert ved at de elastiske deler består av ledere som er omgitt av elastisk material.
4. Kabel som angitt i påstand 1—3, karakterisert ved at de elastiske deler som har i det vesentlige sirkelformet tverrsnitt, har større diameter enn lederne i det ytre lag av kjernen.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH25171A CH542330A (de) | 1971-01-08 | 1971-01-08 | Verfahren zum Verbinden von Teilen eines Bauelementes |
Publications (2)
Publication Number | Publication Date |
---|---|
NO134666B true NO134666B (no) | 1976-08-16 |
NO134666C NO134666C (no) | 1976-11-24 |
Family
ID=4182740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO4690/71A NO134666C (no) | 1971-01-08 | 1971-12-20 |
Country Status (14)
Country | Link |
---|---|
US (1) | US3788021A (no) |
AT (1) | AT341759B (no) |
AU (1) | AU3720571A (no) |
BE (1) | BE777769A (no) |
CA (1) | CA966627A (no) |
CH (1) | CH542330A (no) |
DE (1) | DE2165353A1 (no) |
ES (1) | ES398991A1 (no) |
FR (1) | FR2121653B1 (no) |
GB (1) | GB1379072A (no) |
IT (1) | IT946272B (no) |
NL (1) | NL7117610A (no) |
NO (1) | NO134666C (no) |
ZA (1) | ZA718639B (no) |
Families Citing this family (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NO139976C (no) * | 1975-03-07 | 1979-06-13 | Helmar Nahr | Legeme sammensatt av minst to deler |
US4110948A (en) * | 1977-03-11 | 1978-09-05 | Maier Jr Adolph J | Thermal insulating clips for metal insulated walls and roofs |
DE2844680C3 (de) * | 1978-10-13 | 1983-11-03 | Kress Vertriebs-GmbH, 7247 Sulz | Fenstersprosse |
DK544983A (da) * | 1983-11-28 | 1985-05-29 | Deko Loft & Vaeg As | Stolpeprofil til indvendige skillevaegge |
GB2158481B (en) * | 1984-03-07 | 1987-04-29 | Roger George Irwin | Cavity wall ties for timber frame construction |
NZ212774A (en) * | 1985-07-17 | 1989-10-27 | Lapish Ernest Bertram | Wall tie |
US5054251A (en) * | 1986-07-24 | 1991-10-08 | Kemeny Zoltan A | Structural shock isolation system |
US5778621A (en) * | 1997-03-05 | 1998-07-14 | Connor/Aga Sports Flooring Corporation | Subflooring assembly for athletic playing surface and method of forming the same |
US20050155322A1 (en) * | 1998-04-09 | 2005-07-21 | Robert Kroie | Building elements |
US6122873A (en) * | 1998-06-12 | 2000-09-26 | Connor/Aga Sports Flooring Corporation | Subfloor assembly for athletic playing surface having improved deflection characteristics |
FR2789130B1 (fr) * | 1999-01-28 | 2001-03-09 | Peugeot | Moyen de fixation entre deux pieces ayant des coefficients de dilatation thermique differents |
EP1190145B1 (en) * | 1999-06-08 | 2007-02-14 | Finn Borg | Building construction |
US6367217B1 (en) | 1999-11-04 | 2002-04-09 | Robbins, Inc. | Sleeper assembly for resilient hardwood floor system |
DE19962088A1 (de) * | 1999-12-21 | 2001-07-12 | Andreas Naumann | Wandkonstruktion, Wandbauteil, Wand zur Errichtung von Bauwerken und Verfahren zur Herstellung derselben |
US7093814B2 (en) * | 2002-06-05 | 2006-08-22 | Kinetics Noise Control, Inc. | Vibration isolating mount |
MX2009008183A (es) * | 2007-02-01 | 2010-02-17 | Marlite Inc | Sistema de panel de pared. |
US20080202846A1 (en) * | 2007-02-23 | 2008-08-28 | Mtec, Llc | Device and method for dampening sound transmission and vibration |
US8671632B2 (en) * | 2009-09-21 | 2014-03-18 | California Expanded Metal Products Company | Wall gap fire block device, system and method |
US9745741B2 (en) | 2013-03-14 | 2017-08-29 | Timothy A. Hayes | Structural connection mechanisms for providing discontinuous elastic behavior in structural framing systems |
US9080339B2 (en) * | 2013-03-14 | 2015-07-14 | Timothy A. Hayes | Structural connection mechanisms for providing discontinuous elastic behavior in structural framing systems |
US20140318063A1 (en) * | 2013-04-30 | 2014-10-30 | Alan Case | Building structural connector |
US9574344B2 (en) * | 2013-04-30 | 2017-02-21 | Alan Case | Building structural connector |
WO2016179287A1 (en) | 2015-05-04 | 2016-11-10 | Connor Sports Flooring, Llc | Vibration dampening floor system |
SE540264C2 (en) * | 2016-10-19 | 2018-05-15 | Oneday Wall Ab | Framing section and method of assembling the same |
CA2989713A1 (en) | 2016-12-20 | 2018-06-20 | Clarkwestern Dietrich Building Systems Llc | Finishing accessory with backing strip seal for wall construction |
CA3017148C (en) | 2017-09-11 | 2024-01-02 | Invent To Build Inc. | Seal assembly and light weight exterior wall system using same |
WO2019046971A1 (en) | 2017-09-11 | 2019-03-14 | Invent To Build Inc. | WET SEAL SYSTEM |
AU2019289284A1 (en) * | 2018-06-19 | 2021-02-04 | Studco Australia Pty Ltd | Acoustic mount |
CA3071302C (en) | 2019-02-07 | 2023-04-25 | Invent To Build Inc. | Exterior wall panel assemblies |
CN110805170B (zh) * | 2019-04-24 | 2021-07-16 | 浙江亚厦装饰股份有限公司 | 装配式断桥隔墙模块 |
MC200227B1 (fr) * | 2019-07-12 | 2020-08-03 | Marantier Frederic | Complexe de joints souples pour liaison d'éléments désolidarisés |
US11885138B2 (en) | 2020-11-12 | 2024-01-30 | Clarkwestern Dietrich Building Systems Llc | Control joint |
USD1026252S1 (en) | 2020-11-12 | 2024-05-07 | Clarkwestern Dietrich Building Systems Llc | Control joint |
CN112524129B (zh) * | 2020-12-04 | 2022-09-06 | 东莞承达家居有限公司 | 一种防火防潮实木装饰板 |
CN113338453B (zh) * | 2021-04-29 | 2022-11-04 | 广东闽禹防水防腐科技有限公司 | 一种耐高温复合防水卷材 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US19431A (en) * | 1858-02-23 | Improvement in machines for sowing fertilizers | ||
US1195289A (en) * | 1916-08-22 | Floob construction | ||
US2205725A (en) * | 1935-10-17 | 1940-06-25 | Kavanagh Charles Joseph | Beam structure |
CH296584A (de) * | 1951-10-31 | 1954-02-28 | Koller Ernst | Schallisolierende Wand. |
US3184013A (en) * | 1952-11-04 | 1965-05-18 | Pavlecka John | Interlocked panel structure |
US3002591A (en) * | 1959-08-14 | 1961-10-03 | Walter R Hess | Wall structure |
US3062339A (en) * | 1961-08-22 | 1962-11-06 | E K Geyser Company | Curtain wall |
AT229343B (de) * | 1961-10-13 | 1963-09-10 | Aluminium Ind Ag | Wärmeisolierter Bauteil für Kühlwagen u. dgl. |
GB961268A (en) * | 1963-01-15 | 1964-06-17 | Blakdale Products Ltd | Improvements in or relating to partitioning |
GB1042038A (en) * | 1963-07-16 | 1966-09-07 | Frank Wesley Hetman | Thermal barrier and window frame connector |
US3332170A (en) * | 1964-07-23 | 1967-07-25 | John R Bangs | Structural assembly for the prevention of thermal leakage |
US3296759A (en) * | 1964-12-07 | 1967-01-10 | Pavlecka John | Interlocked hollow panel structure |
US3353318A (en) * | 1966-03-28 | 1967-11-21 | Mcax Corp | Insulated joint for panel walls |
US3686810A (en) * | 1970-11-05 | 1972-08-29 | Charles R Allen | Snap on drywall fastening system |
-
1971
- 1971-01-08 CH CH25171A patent/CH542330A/de not_active IP Right Cessation
- 1971-12-20 NO NO4690/71A patent/NO134666C/no unknown
- 1971-12-21 NL NL7117610A patent/NL7117610A/xx unknown
- 1971-12-22 AU AU37205/71A patent/AU3720571A/en not_active Expired
- 1971-12-22 US US00210933A patent/US3788021A/en not_active Expired - Lifetime
- 1971-12-28 ZA ZA718639A patent/ZA718639B/xx unknown
- 1971-12-29 DE DE19712165353 patent/DE2165353A1/de not_active Withdrawn
- 1971-12-31 ES ES398991A patent/ES398991A1/es not_active Expired
- 1971-12-31 AT AT1130771A patent/AT341759B/de not_active IP Right Cessation
-
1972
- 1972-01-03 IT IT19003/72A patent/IT946272B/it active
- 1972-01-06 BE BE777769A patent/BE777769A/xx unknown
- 1972-01-07 GB GB81472A patent/GB1379072A/en not_active Expired
- 1972-01-07 FR FR7200420A patent/FR2121653B1/fr not_active Expired
- 1972-01-07 CA CA131,962A patent/CA966627A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
ZA718639B (en) | 1972-09-27 |
CA966627A (en) | 1975-04-29 |
AT341759B (de) | 1978-02-27 |
ATA1130771A (de) | 1977-06-15 |
AU3720571A (en) | 1973-06-28 |
IT946272B (it) | 1973-05-21 |
ES398991A1 (es) | 1975-01-01 |
NO134666C (no) | 1976-11-24 |
NL7117610A (no) | 1972-07-11 |
FR2121653A1 (no) | 1972-08-25 |
DE2165353A1 (de) | 1972-07-20 |
US3788021A (en) | 1974-01-29 |
FR2121653B1 (no) | 1974-12-13 |
BE777769A (fr) | 1972-05-02 |
CH542330A (de) | 1973-09-30 |
GB1379072A (en) | 1975-01-02 |
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