PL77929B1 - - Google Patents

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Publication number
PL77929B1
PL77929B1 PL1971150618A PL15061871A PL77929B1 PL 77929 B1 PL77929 B1 PL 77929B1 PL 1971150618 A PL1971150618 A PL 1971150618A PL 15061871 A PL15061871 A PL 15061871A PL 77929 B1 PL77929 B1 PL 77929B1
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PL
Poland
Prior art keywords
groove
board according
beams
rib
edge
Prior art date
Application number
PL1971150618A
Other languages
Polish (pl)
Original Assignee
Schweizerische Aluminium Ag
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Publication date
Application filed by Schweizerische Aluminium Ag filed Critical Schweizerische Aluminium Ag
Publication of PL77929B1 publication Critical patent/PL77929B1/pl

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B61RAILWAYS
    • B61DBODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D17/00Construction details of vehicle bodies
    • B61D17/04Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures
    • B61D17/043Construction details of vehicle bodies with bodies of metal; with composite, e.g. metal and wood body structures connections between superstructure sub-units
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/0004Joining sheets, plates or panels in abutting relationship
    • F16B5/0008Joining sheets, plates or panels in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edge
    • F16B5/0012Joining sheets, plates or panels in abutting relationship by moving the sheets, plates or panels substantially in their own plane, perpendicular to the abutting edge a tongue on the edge of one sheet, plate or panel co-operating with a groove in the edge of another sheet, plate or panel

Description

Plyta utworzona z belek metalowych Przedmiotem wynalazku jest plyta utworzona z belek metalowych, zwlaszcza do scian bocznych skrzyn ladunkowych samochodów ciezarowych, w której to plycie poszczególne sasiadujace ze soba belki doprowadzo¬ ne sa do wzajemnego polaczenia w kierunku ukosnym wzgledem powierzchni plyty, sa polaczone ze soba za pomoca rowka i wypustu i ujete od strony swych powierzchni czolowych w ksztaltki obrzezne o profilu w zasadzie korytkowym.Znane konstrukcje scian bocznych skrzyn ladunkowych samochodów ciezarowych lub wagonów towaro¬ wych i tym podobne plaskie konstrukcje wykonane sa przewaznie z wytlaczanych profili z metali lekkich.Stosownie do zadanej wysokosci sciany laczy sie ze soba krawedziami wzdluznymi odpowiednia ilosc pojedynczych belek, których konce sa nastepnie mocowane od czola w ksztaltke o profilu z reguly korytko¬ wym.Znane rozwiazania polaczenia mocujacego te belki razem, przy zapewnieniu im nalezytej statecznosci wbrew dzialaniu wszelkich wystepujacych obciazen nie daly. zadowalajacych wyników. W wiekszosci rozwiazan krawedzie wzdluzne belek sa uksztaltowane w sposób pozwalajacy na ich wzajemne zaczepianie za posrednic¬ twem haczykowatych wystepów, lub tez przez sprezysto-zatrzaskowe wsuwanie jednych elementów profilu krawedzi w drugie. Laczenie ze soba belek tego typu wymaga nieraz wykonywania trudnych i zlozonych ruchów przesuwania, obrotu i wychylania. Profile takich belek musza byc wykonane z zachowaniem bardzo duzej dokladnosci wymiarów, co z kolei stwarza szereg problemów przy ich wytlaczaniu iprostowaniu. Belki tego typu sa delikatne i ulegaja uszkodzeniu przy transporcie, skladowaniu i podczas montazu, co czesto pociaga za soba koniecznosc ich dodatkowej obróbki przed zamontowaniem, gdyz w przeciwnym razie belka nie nadaje sie do uzytku. Opisane polaczenia belek czesto same przez sie sa zbyt malo stateczne i trzeba je wzmacniac przy pomocy sciagaczy. To z kolei wymaga dodatkowych czynnosci, przy czym w niektórych przypadkach nieunik¬ nione jest wystawanie dodatkowych elementów portad powierzchnie sciany.Znane sa tez polaczenie beiek odznaczajace sie tym, ze zetkniete ze soba krawedzie zamykaja miedzy soba pusta komore, dla polaczenia belek ze soba, wciskane sa elementy laczace.Celem wynalazku jest wyeliminowanie wad znanych rozwiazan. Zadaniem wynalazku jest opracowanie konstrukcji plyty zwlaszcza do scian bocznych z belek z lekkiego metalu umozliwiajacej prosty montaz, to POLSKA RZECZPOSPOLITA LUDOWA URZAD PATENTOWY PRL OPIS PATENTOWY Patent dodatkowy do patentu Zgloszono: 21.09.1971 (P. 150618) Pierwszenstwo: 23.09.1970 Szwajcaria Zgloszenie ogloszono: 30.04.1973 Opis patentowy opublikowano: 20.05.19762 77 929 znaczy nieskomplikowanymi ruchami, korzystnie prostoliniowe i zwrócone w jednym kierunku, przy czym najkorzystniejszy poprzecznie do osi wzdluznej belek, bez potrzeby stosowania dla zmocowania belek ze soba dodatkowej obróbki takiej jak na przyklad wiercenie otworów, zamocowywanie sciagaczy, lub wbijanie elementów laczacych przy czym zarówno po wewnetrznej jak i zewnetrznej stronie sciany nie powinno byc czesci wystajacych. Przede wszystkim jednak sciana powinna miec dostatczna wytrzymalosc na wszelkie wystepujace obciazenia sciskajace i rozciagajace oraz powinna byc latwo zdemontowana, a jej elementy nie powinny miec ciasno stolerowanych wymiarów i nie powinny zbyt latwo podlegac uszkodzeniom w czasie transportu.Zadanie postawione przed wynalazkiem zostalo rozwiazane dzieki temu, ze co najmniej jedna para wsunie¬ tych jeden w drugi elementów belki zawiera równolegle plaszczyzny styku, ustawione pod katem 10—80° do powierzchni sciany.Przedmiot wynalazku jest objasniony na przykladach wykonania na zalaczonym rysunku na którym fig. 1 przedstawiaja przyklady wykonania konstrukcji plyty, w których zazebiajace sie wzajemnie ze soba krawedzie wzdluzne sa niejednakowe, fig. 5—8 przyklady wykonania w których krawedzie sa jednakowe po obu stronach pojedynczej belki.Na fig. 1 pokazano podstawowa postac polaczenia belek. Belki 1 i 2 uksztaltowane jako puste profile wytlaczane, zalozone sa jedna na druga w celu utworzenia plyty wedlug wynalazku, stanowiacej na przyklad boczna sciane skrzyni ladunkowej. Zamiast przedstawionego na fig. 1 pustego profilu jednokomorowego korzyst¬ nie stosuje sie profile wielokomorowe z poprzecznymi przegrodami albo tez profile pelne, przy czym cecha charakterystyczna wynalazku jest jedynie uksztaltowanie krawedzi wzdluznych.Dolna krawedz kazdej z belek zaopatrzona jest w rowek 3, otwarty od strony sasiedniej belki. Równolegle wzajemnie do siebie boki 4 i 5 tego rowka tworza z plaszczyzna sciany ostry kat 6 zawierajacy sie w granicach 10-80°, najkorzystniej 10 do 45°. Górna krawedz kazdej z belek posiada wystep 7, którego boczne plaszczyzny 8 i 9 tworza z powierzchnia sciany kat 6, taki sam jak powierzchnie boczne 4 i 5 rowka 3.Opisane uksztaltowanie krawedzi belek pozwala na nasadzanie ich jednej na druga ruchem prostoliniowym, skierowanym równolegle do ukosnych boków 4, 5 rowków oraz takichze boków 8, 9 wystepów. Po ujeciu tak zlozonych belek od strony ich konców w znane ksztaltki obrzezne (nie uwidocznione na rysunku o zasadniczo profilu korytkowym, skosne polozenie rowka i wystepu nie pozwala na rozsuniecie sie belek w kierunku równo¬ leglym do plyszczyzny sciany.Oddzieleniu sie jednej belki od drugiej ruchem obrotowym, to jest przez przechylenie, zapobiegaja z jednej strony do pewnego stopnia, korytkowe ksztaltki obrzezne, obejmujace konce belek. Poniewaz jednak ksztaltki te osadzone sa na koncach belek i tylko tam sa w pelni skuteczne, dlugosc zas belek jest nieraz znaczna (na przyklad równa 3000-4000 mm), zatem bezposrednie polaczenie belek musi byc tak uksztaltowane, by zabez¬ pieczalo belki na calej ich dlugosci przed skutkami obciazen wychylajacych i skrecajacych. W tym celu korzyst¬ nie wzajemny stosunek wysokosci H do szerokosci B (fig. 2) rowka i wystepu wynosi 1:1, a najkorzystniej wysokosci wymienionych elementów jest wieksza niz ich szerokosc.Dzialanie tak dobranego stosunku wymiarów korzystnie jeszcze wzmacnia sie przez zaopatrzenie krawedzi wzdluznej majacej wystep, obok dolnej partii tego wystepu, w otwarty od strony sasiedniej belki rowek 10, w który to rowek wchodzi zeberko 11, uksztaltowane na krawedzi majacej opisany wyzej rowek glówny 3 (fig. 3), przy czym korzystnym jest równiez umieszczenie rowka 10 obok rowka glównego 3, zas zeberka 11 obok wystepu 7 (fig. 2). Korzystnym jest równiez umieszczenie na dnie 12 rowka glównego skierowane ku wystepowi 7 dodatkowego zeberka 13, wchodzacego w odpowiednie wyjecie 14 wierzcholka wystepu, powiek¬ szajac tym sposobem odpornosc polaczenia na obciazenia skierowane prostopadle do powierzchni sciany (fig. 2).W dalszym rozwinieciu wynalazku kazda krawedz belki zawiera wieksza ilosc zarówno rowków jak i wy- stepów*dzieki czemu utworzone zostaje zazebienie (fig. 4-8). Równiez i czesci brzegowe 15 jednej belki w pla¬ szczyznie sciany nakladaja sie od zewnatrz, wzglednie od wewnatrz, na czesci brzegowe 16 belki sasiedniej (fig. 4, 7, 8), co zapewnia scianie zwiekszona sztywnosc zginania.W przypadkach gdy kazda z krawedzi danej belki zaopatrzona jest zarówno w rowek, jak i w wystep krawedzie te sa uksztaltowane korzystnie jednakowo (fig. 5-8) co ulatwia montaz, gdyz nie potrzeba zwracac uwagi na skladanie ze soba tylko pasujacych do siebie krawedzi.Zarówno belki, jak i obejmujace je ksztaltki obrzezne wytwarza sie w sposób prosty i ekonomiczny na przyklad z odpowiednich stopów aluminiowych, przez wytlaczanie. Montaz ich jest maksymalnie uproszczony, utworzona zas sciana jest gladka, wodoodporna, trudno odksztalcalna i odznaczajaca sie duza sztywnoscia zgina¬ nia. W razie potrzeby napraw lub wymiany pojedynczych czesci, sciana korzystnie jest równie latwo rozbieralna.77 029 3 Jest rzecza oczywista, ze opisana konstrukcja nadaje sie nie tylko na boczne sciany skrzyn ladunkowych samochodów ciezarowych, lecz takze na scianki dzialowe w dowolnych pomieszczeniach, w ogóle zas we wszystkich tych przypadkach, w których zachodzi potrzeba szybkiego i dokonywanego prostymi srodkami wytwarzania elementów plytowych. PL PLA plate made of metal beams The subject of the invention is a plate made of metal beams, in particular for the side walls of cargo boxes for trucks, in which the individual beams adjacent to each other are connected to each other diagonally with respect to the surface of the board, they are connected to each other. by means of a groove and a projection and framed from their front surfaces into peripheral shapes with an essentially trough profile. Known constructions of the side walls of cargo boxes of trucks or freight wagons and similar flat structures are mainly made of extruded light metal profiles. to a given height of the wall, the appropriate number of individual beams are connected with each other with longitudinal edges, the ends of which are then fastened from the front to a shape with a profile with a trough rule. Known solutions for connecting these beams together, providing them with adequate stability against the effects of any occurrences they did not give any loads. satisfactory results. In most of the solutions, the longitudinal edges of the beams are shaped in such a way as to allow them to engage with each other through hook-like projections, or by spring-snap insertion of some elements of the edge profile into the other. Joining beams of this type with each other often requires difficult and complex shifting, rotation and tilting movements. Profiles of such beams must be made with very high dimensional accuracy, which in turn creates a number of problems when extruding and straightening them. Beams of this type are fragile and are damaged during transport, storage and assembly, which often entails the need for additional treatment before installation, otherwise the beam is not fit for use. The described beam connections are often too stable by themselves and need to be reinforced with braces. This, in turn, requires additional activities, and in some cases protruding of additional portions of the wall surfaces is unavoidable. Beams are also known, characterized by the fact that the edges touching each other close the empty chamber between them, for connecting the beams with each other, pressed There are connecting elements. An object of the invention is to overcome the drawbacks of the known solutions. The task of the invention is to develop a panel structure, especially for side walls, made of light metal beams, enabling easy assembly, POLISH PEOPLE'S REPUBLIC PATENT OFFICE OF THE PRL PATENT DESCRIPTION Additional patent to the patent Applied: 09/21/1971 (P. 150618) Origin: 09/23/1970 Application: Switzerland : April 30, 1973 The patent was published: May 20, 19762 77 929 means with uncomplicated movements, preferably rectilinear and facing in one direction, the most advantageous transversely to the longitudinal axis of the beams, without the need to use additional processing to fix the beams together, such as drilling holes , attaching the pullers, or hammering connecting elements, with no protruding parts on the inside and outside of the wall. Above all, however, the wall should have sufficient strength to withstand any existing compressive and tensile loads and should be easily disassembled, and its elements should not have tightly tolerated dimensions and should not be easily damaged during transport. The task set for the invention was solved thanks to this, that at least one pair of beam elements inserted into each other has parallel contact planes, positioned at an angle of 10-80 ° to the wall surface. The subject matter of the invention is explained on the basis of exemplary embodiments in the attached drawing, in which Fig. 1 shows examples of the slab construction, in which the longitudinal edges overlap with each other are unequal, Figs. 5-8 examples of embodiments in which the edges are the same on both sides of a single beam. Fig. 1 shows the basic form of the beam connection. The beams 1 and 2, formed as hollow extruded profiles, are placed on top of each other to form a panel according to the invention, for example being a side wall of a cargo box. Instead of the single-chamber hollow profile shown in Fig. 1, preferably multi-chamber profiles with transverse partitions or solid profiles are used, the invention being characterized only by the shaping of the longitudinal edges. The lower edge of each beam is provided with a groove 3, open from the adjacent side. beams. The sides 4 and 5 of this groove are parallel to each other and the plane of the wall forms a sharp angle 6 ranging from 10-80 °, most preferably 10 to 45 °. The upper edge of each beam has a protrusion 7, the side planes 8 and 9 of which form an angle 6 with the wall surface, the same as the side surfaces 4 and 5 of the groove 3. The described shape of the edges of the beams allows them to be placed on top of the other with a rectilinear motion, directed parallel to oblique sides 4, 5 grooves and such sides 8, 9 protrusions. After framing such complex beams at their ends into the known peripheral shapes (not shown in the figure with a substantially trough profile, the oblique position of the groove and the protrusion does not allow the beams to slide apart in the direction parallel to the plane of the wall. rotation, i.e. by tilting, is prevented, on the one hand, to some extent, by the trough-shaped perimeter shapes that embrace the ends of the beams. However, since these shapes are seated at the ends of the beams and are only fully effective there, the length of the beams is sometimes considerable (for example, equal to 3000-4000 mm), therefore the direct connection of the beams must be shaped in such a way as to protect the beams over their entire length from the effects of tilting and torsion loads. For this purpose, preferably the mutual ratio of the height H to the width B (Fig. 2) of the groove and the protrusion is 1: 1, and most preferably the height of the above-mentioned elements is greater than their width. the trench is preferably further strengthened by providing the longitudinal edge with a projection next to the lower part of this projection with a groove 10 open on the side of the adjacent beam, into which groove is received a rib 11, formed at the edge having the main groove 3 described above (Fig. 3), it is also advantageous to arrange the groove 10 next to the main groove 3 and the rib 11 next to the projection 7 (Fig. 2). It is also advantageous to place on the bottom 12 of the main groove facing the protrusion 7 of an additional rib 13 that fits into the corresponding cutout 14 of the protrusion tip, thus increasing the resistance of the connection to loads directed perpendicular to the wall surface (Fig. 2). the edge of the beam contains a greater number of both grooves and steps * thereby creating an overlap (Figs. 4-8). Also, the edge portions 15 of one beam in the plane of the wall overlap from the outside, or from the inside, to the edge portions 16 of the adjacent beam (Figs. 4, 7, 8), which provides the wall with increased bending stiffness. a given beam is provided with both a groove and a protrusion, the edges are preferably shaped equally (fig. 5-8), which facilitates the assembly, because you do not need to pay attention to folding together only the matching edges. The peripheral shapes are easily and economically produced, for example, from the corresponding aluminum alloys, by extrusion. Their assembly is simplified as much as possible, the created wall is smooth, waterproof, hardly deformable and characterized by high bending stiffness. Should individual parts need to be repaired or replaced, the wall is preferably also easily dismantled. 77 029 3 It goes without saying that the structure described is suitable not only for the side walls of the truck body, but also for partition walls in any room, in general. in all those cases where there is a need for quick and simple production of plate elements. PL PL

Claims (9)

1. Zastrzezenia patentowe 1. Plyta utworzona z belek metalowych, zwlaszcza do scian bocznych skrzyn ladunkowych samochodów ciezarowych, w której to plycie poszczególne, sasiadujace ze soba belki doprowadzone do wzajemnego polacze¬ nia w kierunku ukosnym wzgledem powierzchni plyty, sa polaczone ze soba za pomoca rowka i wypustu i ujete przynajmniej od strony swych powierzchni czolowych w ksztaltki obrzezne o profilu w zasadzie korytkowym, znamienna ty m, ze co najtaniej jedna para wsunietych jeden w drugi elementów (3, 7) belek zawiera równolegle plaszczyzny styku , ustawione pod katem (6) 10—80° do powierzchni sciany.1. Claims 1. A plate made of metal beams, especially for the side walls of cargo trucks, in which the individual plates, adjacent to each other, connected to each other diagonally with respect to the surface of the plate, are connected to each other by means of groove and projection and framed at least from the side of their face surfaces into peripheral shapes with a substantially trough profile, characterized by the fact that at least one pair of elements (3, 7) inserted into each other of the beams contains parallel contact surfaces, set at an angle (6 ) 10-80 ° to the wall surface. 2. Plyta wedlug zastrz. 1, znamienna t y m, ze belki stanowia puste profile.2. Disc according to claim The method of claim 1, characterized in that the beams are hollow profiles. 3. Plyta wedlug zastrz. 1, znamienna t y m, ze jedna i ta sama krawedz belki zaopatrzona jest w jeden lub wiecej rowków (3) i w jeden lub wiecej wypustów (7).3. The board according to claim The method of claim 1, characterized in that one and the same edge of the beam is provided with one or more grooves (3) and with one or more tongues (7). 4. Plyta wedlug zastrz. 1 i 2, z n a m i e n n a t y m, ze krawedzie wzdluzne pojedynczej belki sa uksztal¬ towane symetrycznie.4. The board according to claim 1 and 2, with the fact that the longitudinal edges of a single beam are symmetrically formed. 5. Plyta wedlug zastrz. 1,znamienna tym, ze krawedz wzdluzna belki zaopatrzona w wypust (7) posiada co najmniej jeden rowek (10), równolegly do wypustu, a krawedz wzdluzna zaopatrzona w rowek (3) posiada co najmniej jedno zeberko (11), biegnace wzdluz tej krawedzi i wsuniete w rowek (10) sasiedniej belki.5. The board according to claim 3. The cutterbar according to claim 1, characterized in that the longitudinal edge of the beam (7) has at least one groove (10) parallel to the groove, and the longitudinal edge (3) has at least one rib (11) running along this edge and inserted into the groove (10) of the adjacent beam. 6. Plyta wedlug zastrz. 1, znamienna tym, ze dno (12) rowka (3) posiada co najmniej jedno bieg¬ nace wzdluz tego dna i skierowane ku wystepowi (7) zeberko (13), i ze wierzcholek wystepu posiada wyjecie (14), w które wsuniete jest to zeberko (13).6. The board according to claim A rib (13) as claimed in claim 1, characterized in that the bottom (12) of the groove (3) has at least one rib (13) running along the bottom and directed towards the protrusion (7), and that the top of the protrusion has a recess (14) into which is inserted it's a rib (13). 7. Plyta wedlug zastrz. 1, znamienna tym, ze partie brzegowe (15) jednej belki nakladaja sie, w plaszczyznie sciany, od zewnatrz wzglednie od wewnatrz, na partie brzegowe (16) belki sasiedniej7. The board according to claim 3. The method of claim 1, characterized in that the edge portions (15) of one beam overlap, in the plane of the wall, from the outside or from the inside, on the edge portions (16) of an adjacent beam 8. Plyta wedlug zastrz. 1, znamienna tym, ze stosunek wysokosci (H) do szerokosci (B) zarówno rowka jak i wypustu wynosi co najmniej 1.8. The board according to claim 5. The razor of claim 1, wherein the ratio of height (H) to width (B) of both the groove and the projection is at least 1. 9. Plyta wedlug zastrz. 1 i 7, z n a m i e n n a t y m, ze wysokosc (H) rowka i wypustu jest wieksza niz ich szerokosc (B).77 929 Fig. 1 Fig. 2 Fig. 3 Im Fig. 4 16 ! ,:\f 1 f^ fi //~"\ 15- 11! r» 16 Fig. 7 Fig. 8 Prac. Poligraf. UPPRL. Naklad 120 + 18 egz. Cena 10 zl PL PL9. The board according to claim 1 and 7, with the fact that the height (H) of the groove and the projection is greater than their width (B). 77 929 Fig. 1 Fig. 2 Fig. 3 and Fig. 4 16! ,: \ f 1 f ^ fi // ~ "\ 15- 11! r» 16 Fig. 7 Fig. 8 Printed by UPPRL. Mintage 120 + 18 copies Price PLN 10 PL PL
PL1971150618A 1970-09-23 1971-09-21 PL77929B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1405470A CH512697A (en) 1970-09-23 1970-09-23 Flat surface formed from metal planks

Publications (1)

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PL77929B1 true PL77929B1 (en) 1975-04-30

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JP (1) JPS56134263U (en)
AT (1) AT319059B (en)
BE (1) BE772694A (en)
CH (1) CH512697A (en)
DE (2) DE7136212U (en)
ES (1) ES198523Y (en)
FI (1) FI55471C (en)
FR (1) FR2108402A5 (en)
GB (1) GB1361805A (en)
HU (1) HU165750B (en)
IL (1) IL37723A (en)
NL (1) NL174234C (en)
NO (1) NO127548B (en)
PL (1) PL77929B1 (en)
SE (1) SE379702B (en)
YU (1) YU238871A (en)
ZA (1) ZA716178B (en)

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Also Published As

Publication number Publication date
DE2147623C2 (en) 1985-05-02
HU165750B (en) 1974-10-28
CH512697A (en) 1971-09-15
YU238871A (en) 1979-04-30
DE7136212U (en) 1972-03-16
FI55471C (en) 1979-08-10
AT319059B (en) 1974-12-10
BE772694A (en) 1972-01-17
FR2108402A5 (en) 1972-05-19
DE2147623A1 (en) 1972-03-30
IL37723A (en) 1974-11-29
ES198523Y (en) 1975-12-01
ES198523U (en) 1975-08-01
FI55471B (en) 1979-04-30
GB1361805A (en) 1974-07-30
SE379702B (en) 1975-10-20
NL174234B (en) 1983-12-16
NL7112232A (en) 1972-03-27
NL174234C (en) 1984-05-16
IL37723A0 (en) 1971-11-29
JPS56134263U (en) 1981-10-12
NO127548B (en) 1973-07-09
ZA716178B (en) 1972-06-28

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