DK153764B - Wire rope - Google Patents
Wire rope Download PDFInfo
- Publication number
- DK153764B DK153764B DK409878AA DK409878A DK153764B DK 153764 B DK153764 B DK 153764B DK 409878A A DK409878A A DK 409878AA DK 409878 A DK409878 A DK 409878A DK 153764 B DK153764 B DK 153764B
- Authority
- DK
- Denmark
- Prior art keywords
- cloths
- layers
- scents
- cloth
- threads
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/007—Making ropes or cables from special materials or of particular form comprising postformed and thereby radially plastically deformed elements
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
- D07B2201/1016—Rope or cable structures characterised by their internal structure characterised by the use of different strands
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1028—Rope or cable structures characterised by the number of strands
- D07B2201/1036—Rope or cable structures characterised by the number of strands nine or more strands respectively forming multiple layers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/104—Rope or cable structures twisted
- D07B2201/1072—Compact winding, i.e. S/S or Z/Z
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2019—Strands pressed to shape
Landscapes
- Ropes Or Cables (AREA)
Description
iin
DK 153764BDK 153764B
Den foreliggende opfindelse angår et ståltov med en hjertedugt og af den i krav l's indledning angivne art.The present invention relates to a steel rope with a heart cloth and of the kind specified in the preamble of claim 1.
Almindeligvis benævner man de nævnte flerlagstove som ståltove g fremstillet i parallel og de nævnte flerlagsdugter som parallelt slåede dugter.Generally, said multi-layered ropes are referred to as steel ropes g made in parallel and said multi-layered rags as parallel-raked rags.
Parallelt slåede dugter er på grund af den linieberøring, som deres tråde har indbyrdes, i flere henseender overlegne i forhold til normal dugter, i hvilke trådene af forskellige lag 10 krydser hinanden ved punktberøring. Frem for alt udmærker de parallelt slåede dugter sig ved en større rumkoefficient (tysk: FUllfaktor, dvs. tværsnittets metalandel, idet den øvrige andel består af mellemrum), større modstandsdygtighed mod tværpresninger, længere levetid og større fleksibilitet.Parallel beats, because of the line contact between their threads, are superior in many respects to normal cloths in which the threads of different layers 10 intersect at point touch. Above all, the parallel smells are distinguished by a larger space coefficient (German: FULL factor, ie the metal section of the cross section, with the other part consisting of spaces), greater resistance to cross-pressing, longer service life and greater flexibility.
1515
Principielt giver parallelfremsti 11ingsmåden også tovet denne kombination af fordele, selv om det er i begrænset omfang: Tovet udviser ligeledes den store rumkoefficient, men modstandsevnen mod tværpresninger, levetid og fleksibilitet dog forholdsvis kun i formindsket grad.In principle, the parallel fabrication method also provides this combination of advantages, although to a limited extent: The rope also exhibits the large space coefficient, but the resistance to cross-pressing, longevity and flexibility, however, only to a limited extent.
2020
Det er den foreliggende opfindelses formål at give et tov af den indledningsvis omtalte art, der f.eks. kendes fra GB-pa-tentskrift nr. 917.460, en større fleksibilitet.It is an object of the present invention to provide a rope of the kind mentioned in the introduction, e.g. is known from GB Patent Specification No. 917,460, a greater flexibility.
2g Ifølge opfindelsen tilgodeses dette formål ved, at det indledningsvis omtalte ståltov er ejendommelig ved, at dugterne i mindst to på hinanden følgende dugtlag har en glat overflade.2g According to the invention, this object is met in that the initially mentioned steel rope is peculiar in that the cloths have at least two successive layers of cloth a smooth surface.
Dermed får disse dugter også i tovet indbyrdes den linieberøring, som trådene i paralleltslåede dugter har indbyrdes. El-30 lers fremkommer altid kun punktberøring mellem dugterne, også når de forløber parallelt. Netop i dette tilfælde opstår der et antal indbyrdes indgreb af trådene i rillerne, der hindrer dugternes længdeforskydning i forhold til hinanden og derved gør tovet stift. Disse indgrebs sammen- eller indkrognings-3 5 virkning bevirker, at tovet bliver stivere, og er særligt udprægede, når man ud over parallelslåningen på den i og for sig foretrukne måde vælger slåningsretningerne og -længderne således, at forskellige dugters tråde ikke krydser hinanden.As a result, these cloths also get into the rope with each other the line contact that the threads in parallel cloths have among themselves. El-30 clers always only show spot contact between the dews, even when running in parallel. It is precisely in this case that a number of interrelationships of the threads in the grooves occur, which prevent the longitudinal displacement of the dews in relation to each other, thereby making the rope stiff. These interlocking or entangling effects cause the rope to become stiffer, and are particularly pronounced when, in addition to the parallel locking, in the preferred manner and lengths of the mowing, the strands of different cloths do not intersect.
DK 153764BDK 153764B
22
Den ifølge opfindelsen tilvejebragte linieberøring udelukker ikke blot sammenkrogninger, men reducerer også på afgørende måde dugternes fladetryk mod hinanden, hvilket er medbestemmende for tovets modstandsevne og levetid. Derudover bliver 5 det muligt at vælge trådenes slålængde i dugterne udelukkende m med henblik på dugternes udvidelsesegenskaber uden at skulle tage hensyn til, at trådoverskæringer skal undgås, hvilket yderligere forbedrer tovet væsentligt.The line contact provided by the invention not only eliminates hook-ups, but also significantly reduces the surface pressures of the dews against each other, which is instrumental in the resistance and longevity of the rope. In addition, it becomes possible to choose the thread length of the wires exclusively for the purpose of expanding the wires without having to take into account the need to avoid thread cuts, which further improves the rope considerably.
Dugter med glat overflade kendes fra ca. 1930. I GB-patent-skrift nr. 794.412 blev det den gang foreslået at fremstille sådanne dugter ved trækning gennem en træksten. I dette skrift blev det også foreslået at fremstille tove af sådanne dugter, der har linieberøring mellem hjertedugten og de på denne slå-ede enkelte dugtlag. Linieberøringen ved dette sted har imidlertid i forhold til det ved den foreliggende opfindelse opnåede forslag praktisk taget ingen vægt. Normale dugters berøringspunktsantal er i et tov fremstillet i parallel mere end fem gange større mellem dugtlagene, og hver af disse berøring-20 er har ved de med tovets bøjninger forbundne længdeforskydninger mellem dugterne indbyrdes en langt større skadelig virkning på deres først umiddelbart henholdsvis middelbart på hjertedugten støttede dugtlag end på selve hjertedugten.Smooth surface scents are known from approx. 1930. GB Patent No. 794,412 then proposed that such scents be made by drawing through a drawing stone. In this writing, it was also proposed to produce ropes of such scents which have line contact between the heart virtue and the layers of this scented cloth. However, the line contact at this location has practically no weight in relation to the present invention. Normal number of touch points in a rope produced in parallel is more than five times greater between the layers of cloth, and each of these touch-20s has a far greater detrimental effect on their first immediately and immediately on the heart virtues associated with the bends of the rope. supported dew layers than on the heart virtue itself.
Endvidere er det i GB-patentskrift 1.084.423 foreslået yder-25 ligere at spalte trådene i en dugt yderligere til såkaldte underdugter eller kordeler for at formindske bøjningsspændingen i det hidtidige trådtværsnit og derved opnå fordele med hensyn til fleksibilitet, bestandighed over for vekslende bøjninger og levetid. Imidlertid skal tovet i denne forbindelse forblive 30 uændret, og derfor skal kordelerne ved fortætning bringes til at antage trådenes fulde og runde tværsnit.Further, in GB patent 1,084,423, it is further proposed to further split the yarns of a cloth into so-called sub-cloths or cord parts to reduce the bending stress of the previous yarn cross-section, thereby obtaining advantages in terms of flexibility, resistance to alternating bends and life. However, in this connection, the rope must remain unchanged, and therefore the condensation of the wires must be made to assume the full and round cross sections of the wires.
Ifølge den foreliggende opfindelse benyttes derimod uændret sådanne tråde som hidtil, og der skal benyttes glatte dugter, 35 der ifølge det i GB-patentskri ft 1.084.423 anviste bevarer en uændret opbygning.On the other hand, according to the present invention, such threads are used as before, and smooth cloths are used which, according to the patent specification disclosed in GB patent specification 1,084,423, retain an unchanged structure.
De nævnte dugter med glat overflade er fortrinsvis trukne og/ eller valsede dugter, der kan fremstilles ved trækning gennemSaid smooth surface scents are preferably drawn and / or rolled scents which can be produced by drawing through
DK 153764 BDK 153764 B
3 en træksten eller mellem valser eller ved hjælp af drevne valser.3 a drawing stone or between rollers or by means of driven rollers.
Også dugter med et ydre lag af profiltråde er mulige, f.eks.Also, scents with an outer layer of profile threads are possible, e.g.
_ af den kendte art for sluttede dugter af Z-tråde._ of the known kind for finished wires of Z-threads.
DD
Dugter med et ydre lag af fladtråde har, omend mindre fuldkorn-ment, ligeledes en i forhold til normale dugter glat overflade og kommer derfor i betragtning ved den foreliggende opfindelse .Cloths having an outer layer of flat wires, albeit less fully grained, also have a smooth surface compared to normal scents and are therefore considered by the present invention.
1010
Slutteligt kan man give dugterne en plastkappe for at give dem en glat overflade. Frem for alt kommer her termoplastiske stoffer, såsom polyolefiner eller polyamider, eller tværbundne plastmaterialer i betragtning.Finally, you can give the scents a plastic sheath to give them a smooth surface. Above all, thermoplastic materials such as polyolefins or polyamides or cross-linked plastics are considered here.
1515
Med de trukne og/eller valsede og med plastkappe forsynede dugter medfører den foreliggende opfindelse endvidere den yderligere betragtelige fordel, at man virkelig kan opnå, at dugterne ligger an imod hinanden på alle sider, fordi de hver 20 gang kan bringes på den dertil nødvendige diameter, der kan beregnes, medens man af økonomiske grunde ellers kun har rådighed over tilnærmelsesvise størrelser.Furthermore, with the drawn and / or rolled and plastic sheathed cloths, the present invention has the additional considerable advantage that it is possible to achieve that the cloths are in contact with each other on all sides because they can be brought to the required diameter every 20 times. that can be calculated, while for economic reasons it is only available to approximate sizes.
Selv om den konsekvente gennemførelse af opfindelsen for et tov fremstillet ved parallelslåning betyder, at der udeluk-25 kende anvendes dugter med glat overflade fra hjertedugten til yderdugterne, opnås der dog allerede en fordel, når blot to efter hinanden følgende lag, f.eks. hjertedugten og det (de) indre dugtlag, er formet ifølge den foreliggende opfindelse, og det ydre parallelt derpå slåede lag består af sædvanlige 30 dugter. På et sådant tov kan man bedre erkende nedslidningsgraden .Although the consistent implementation of the invention for a rope made by parallel locking means that only smooth surface cloths are used from the heart cloth to the outer cloths, an advantage is already achieved when only two consecutive layers, e.g. the heart virtue and the inner fabric layer (s) are formed in accordance with the present invention, and the outer parallel striking layer consists of the usual 30 fragrances. On such a rope one can better recognize the degree of attrition.
00
Da dugterne ved ståltovet ifølge opfindelsen skal være parallelt slåede dugter, når dugterne består af flere lag, er den 35 ved opfindelsen tilstræbte linieberøring for elementerne mellem dugternes tråde lige så meget til stede som mellem tovets dugter.Since the cloths of the steel rope according to the invention are to be parallel-beaten cloths, when the cloths are made up of several layers, the line contacting of the elements between the threads of the cloths as sought by the invention is as much present as between the cloths of the fabric.
44
DK 153764BDK 153764B
På tegningen vises to udførelseseksempler for den foreliggende opfindelse, idet fig. 1 viser et ståltov fremstillet ved paralleltremgangsmåden g af trukne paralleltslåede dugter, og φ fig. 2 viser et ståltov fremstillet efter parallelfremgangsmåden af paralleltslåede dugter med plastkappe.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a steel rope made by the parallel process g of drawn parallel strikes, and φ fig. 2 shows a steel rope made according to the parallel method of parallel-cut cloths with plastic sheath.
Begge tove består af en hjertedugt 11 (fig. 1), henholdsvis 21 10 (fig. 2), et indre dugtlag af fem større dugter 12, henholdsvis 22, og fem mindre dugter 13, henholdsvis 23 og et parallelt med det indre dugtlag slået ydre dugtlag af ti ens dugter 14, henholdsvis 24.Both ropes consist of a heart cloth 11 (Fig. 1) and 21 10, respectively (Fig. 2), an inner cloth layer of five larger cloths 12 and 22, respectively, and five smaller cloths 13, 23 and 23, respectively, and a parallel to the inner cloth sheet. outer fabric layer of ten identical cloths 14 and 24 respectively.
^g Hjertedugterne 11 og 21 er enlagsdugter 1+6. Dugterne 12 er tolags dugter 1 + 6 + 12. Dugterne 22 er to-lags Warrington-dugter 1+6+6+6. Dugterne 13 og 23 er enlags dugter 1 + 6. Dugterne 14 og 24 er to-lags Fillerdugter 1 + 6 + 6 + 12.^ g The heart virtues 11 and 21 are single-layered scents 1 + 6. The Scents 12 are two-layer Scents 1 + 6 + 12. The Scents 22 are two-layer Warrington Scents 1 + 6 + 6 + 6. The daughters 13 and 23 are single layered scents 1 + 6. The scents 14 and 24 are two layer Filler scents 1 + 6 + 6 + 12.
Dugterne 11 til 14 er trukket gennem en træksten med rundt gen- 20 nemløbstværsnit eller valset rundt. Deres enkelte tråde er derved tilpasset til hinanden og slutter i dugtens indre i det væsentlige uden løkker til hinanden. Langs omkredsen befinder der sig nu blot små riller 15 mellem de enkelte tråde·, men i det hele er dugternes omkreds cylindrisk glat.The rags 11 to 14 are drawn through a draw stone of about 20 mm diameter or rolled around. Their individual threads are thereby adapted to each other and end in the interior of the cloth substantially without loops to each other. Along the circumference there are now only small grooves 15 between the individual threads ·, but on the whole the circumference of the dew is cylindrical smooth.
2525
Dugternes indbyrdes tætte anbringelse forhøjer desuden tovets metaltværsni t.In addition, the close proximity of the rags increases the metal cross-section of the rope.
Dugterne 21 til og med 24 er forsynet med en plastkappe 25.The scents 21 through 24 are provided with a plastic sheath 25.
30 Denne udfylder rillerne mellem yderdugterne og dækker også med et tyndt lag hen over ydertrådenes yderste perifere afsnit i dugten. Dugterne har dermed en fuldstændigt lukket, cylindrisk glat overflade.30 This fills the grooves between the outer cloths and also covers with a thin layer over the outer peripheral sections of the cloth. The scents thus have a completely closed, cylindrical smooth surface.
Man kan også kombinere forskelligartede dugter med hinanden, f.eks. trukne dugter med prof i 1 trådsdugter osv..You can also combine different scents with each other, e.g. drawn cloths with prof in 1 thread cloths etc ..
3535
Claims (5)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2742003A DE2742003C2 (en) | 1977-09-17 | 1977-09-17 | Wire rope |
| DE2742003 | 1977-09-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK409878A DK409878A (en) | 1979-03-18 |
| DK153764B true DK153764B (en) | 1988-08-29 |
Family
ID=6019257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK409878AA DK153764B (en) | 1977-09-17 | 1978-09-15 | Wire rope |
Country Status (16)
| Country | Link |
|---|---|
| AT (1) | AT373302B (en) |
| BE (1) | BE870512A (en) |
| BR (1) | BR7806062A (en) |
| CH (1) | CH632545A5 (en) |
| DE (1) | DE2742003C2 (en) |
| DK (1) | DK153764B (en) |
| ES (1) | ES238162U (en) |
| FR (1) | FR2403416A1 (en) |
| GB (2) | GB2004576B (en) |
| GR (1) | GR65347B (en) |
| IT (1) | IT1099097B (en) |
| LU (1) | LU80238A1 (en) |
| NL (1) | NL7809280A (en) |
| NO (1) | NO151553C (en) |
| PT (1) | PT68562A (en) |
| SE (1) | SE7809773L (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2949755C3 (en) * | 1979-12-07 | 1985-08-29 | Gerhard 8632 Neustadt Dietz | Wire rope |
| DE3117452A1 (en) * | 1981-05-02 | 1982-11-18 | Drahtseilwerk Saar GmbH, 6654 Kirkel | WIRE ROPE FROM A CORE ROPE AND AN OUTER LEAD LAYER STRIPPED ON IT, IN PARTICULAR TURN-FREE WIRE ROPE |
| GB8315181D0 (en) * | 1983-06-02 | 1983-07-06 | Cable Belt Ltd | Cables |
| DE3236348A1 (en) * | 1982-09-28 | 1984-03-29 | Dietz, Monika, 8632 Neustadt | Manufacture of compacted wire ropes |
| US4624097A (en) * | 1984-03-23 | 1986-11-25 | Greening Donald Co. Ltd. | Rope |
| FI125355B (en) * | 2007-04-19 | 2015-09-15 | Kone Corp | Lifting rope and method of manufacturing a rope for a lifting device |
| CN101985816B (en) * | 2009-12-17 | 2013-04-17 | 江苏赛福天钢索股份有限公司 | Steel wire rope for telescopic arm of crane and manufacturing method thereof |
| CN101988271B (en) * | 2009-12-17 | 2013-04-17 | 江苏赛福天钢索股份有限公司 | Steel wire rope for crawler crane and production method thereof |
| CN101988270B (en) * | 2010-06-21 | 2012-07-04 | 江苏赛福天钢索股份有限公司 | High-strength compacted-strand steel wire rope for crane and preparation method thereof |
| CN102517937A (en) * | 2011-12-23 | 2012-06-27 | 建峰索具有限公司 | Double-compacted stranded steel rope for riggings |
| CN104088178B (en) * | 2014-07-23 | 2016-06-08 | 贵州钢绳股份有限公司 | Multilayer strand internal layer rope forges compacted wire rope and manufacture method thereof |
| CN109295780A (en) * | 2018-09-17 | 2019-02-01 | 江苏普乐菲塑料有限公司 | A kind of PP plastic ties of high tenacity |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB476863A (en) * | 1936-03-16 | 1937-12-16 | Callenders Cable & Const Co | Improvements in the manufacture of wire strands |
| DK94399C (en) * | 1954-08-13 | 1962-09-24 | British Ropes Ltd | Method of making steel ropes, welds or cores and apparatus for carrying out the method. |
| GB1046079A (en) * | 1963-04-22 | 1966-10-19 | United States Steel Corp | Locked coil cable and method of making the same |
| GB1084423A (en) * | 1964-12-23 | 1967-09-20 | American Chain & Cable Co | Multi-element wire line having compacted strands |
| GB1306987A (en) * | 1970-10-23 | 1973-02-14 | Od Polt Institut | Method of forming an interlocked layer of wires on a core |
| NO126870B (en) * | 1964-08-20 | 1973-04-02 | British Ropes Ltd |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB794412A (en) * | 1954-08-13 | 1958-05-07 | British Ropes Ltd | Improvements in or relating to wire ropes |
| DE1064391B (en) * | 1958-04-24 | 1959-08-27 | Gerhard Dietz | Stranded spiral rope |
| DE2218402B2 (en) * | 1972-04-15 | 1980-07-31 | Gustav Wolf, Seil- Und Drahtwerke, 4830 Guetersloh | High strength steel cable - contg. steel cores covered with spiral bandage of plastic strip |
-
1977
- 1977-09-17 DE DE2742003A patent/DE2742003C2/en not_active Expired
-
1978
- 1978-01-04 FR FR7800373A patent/FR2403416A1/en active Granted
- 1978-09-11 NO NO783068A patent/NO151553C/en unknown
- 1978-09-12 NL NL7809280A patent/NL7809280A/en not_active Application Discontinuation
- 1978-09-13 GR GR57218A patent/GR65347B/en unknown
- 1978-09-14 GB GB7836782A patent/GB2004576B/en not_active Expired
- 1978-09-14 GB GB8205171A patent/GB2090621B/en not_active Expired
- 1978-09-14 AT AT0663378A patent/AT373302B/en not_active IP Right Cessation
- 1978-09-14 LU LU80238A patent/LU80238A1/en unknown
- 1978-09-15 DK DK409878AA patent/DK153764B/en not_active Application Discontinuation
- 1978-09-15 PT PT68562A patent/PT68562A/en unknown
- 1978-09-15 BE BE190510A patent/BE870512A/en not_active IP Right Cessation
- 1978-09-15 BR BR7806062A patent/BR7806062A/en unknown
- 1978-09-15 IT IT27701/78A patent/IT1099097B/en active
- 1978-09-16 ES ES1978238162U patent/ES238162U/en active Pending
- 1978-09-18 SE SE7809773A patent/SE7809773L/en unknown
- 1978-09-18 CH CH973878A patent/CH632545A5/en not_active IP Right Cessation
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB476863A (en) * | 1936-03-16 | 1937-12-16 | Callenders Cable & Const Co | Improvements in the manufacture of wire strands |
| DK94399C (en) * | 1954-08-13 | 1962-09-24 | British Ropes Ltd | Method of making steel ropes, welds or cores and apparatus for carrying out the method. |
| GB1046079A (en) * | 1963-04-22 | 1966-10-19 | United States Steel Corp | Locked coil cable and method of making the same |
| NO126870B (en) * | 1964-08-20 | 1973-04-02 | British Ropes Ltd | |
| GB1084423A (en) * | 1964-12-23 | 1967-09-20 | American Chain & Cable Co | Multi-element wire line having compacted strands |
| GB1306987A (en) * | 1970-10-23 | 1973-02-14 | Od Polt Institut | Method of forming an interlocked layer of wires on a core |
Also Published As
| Publication number | Publication date |
|---|---|
| CH632545A5 (en) | 1982-10-15 |
| ES238162U (en) | 1978-12-01 |
| IT1099097B (en) | 1985-09-18 |
| ATA663378A (en) | 1980-12-15 |
| DK409878A (en) | 1979-03-18 |
| GB2090621B (en) | 1982-12-15 |
| AT373302B (en) | 1984-01-10 |
| PT68562A (en) | 1978-10-01 |
| GB2090621A (en) | 1982-07-14 |
| FR2403416A1 (en) | 1979-04-13 |
| LU80238A1 (en) | 1979-03-07 |
| SE7809773L (en) | 1979-03-18 |
| NO151553C (en) | 1985-05-02 |
| GB2004576A (en) | 1979-04-04 |
| NO783068L (en) | 1979-03-20 |
| DE2742003C2 (en) | 1983-09-08 |
| DE2742003A1 (en) | 1979-03-29 |
| FR2403416B1 (en) | 1983-08-26 |
| GR65347B (en) | 1980-08-18 |
| GB2004576B (en) | 1982-12-01 |
| BE870512A (en) | 1979-01-02 |
| IT7827701A0 (en) | 1978-09-15 |
| BR7806062A (en) | 1979-05-15 |
| NL7809280A (en) | 1979-03-20 |
| NO151553B (en) | 1985-01-14 |
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