BE818506A - Procede et dispositif pour le soudage de feuilles composites contenant des couches metalliques en vue de l'obtention de corps creux - Google Patents
Procede et dispositif pour le soudage de feuilles composites contenant des couches metalliques en vue de l'obtention de corps creuxInfo
- Publication number
- BE818506A BE818506A BE147303A BE147303A BE818506A BE 818506 A BE818506 A BE 818506A BE 147303 A BE147303 A BE 147303A BE 147303 A BE147303 A BE 147303A BE 818506 A BE818506 A BE 818506A
- Authority
- BE
- Belgium
- Prior art keywords
- view
- metal layers
- containing metal
- hollow bodies
- composite sheets
- Prior art date
Links
- 239000002131 composite material Substances 0.000 title 1
- 239000002184 metal Substances 0.000 title 1
- 238000000034 method Methods 0.000 title 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/3644—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
- B29C65/366—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a coating or being printed, e.g. being applied as a paint or forming a printed circuit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3668—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the means for supplying heat to said heated elements which remain in the join, e.g. special induction coils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
- B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
- B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
- B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
- B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
- B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
- B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
- B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
- B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
- B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/8145—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
- B29C66/81455—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the constructional aspects of the pressing elements, e.g. of the welding jaws or clamps being a fluid inflatable bag or bladder, a diaphragm or a vacuum bag for applying isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19732339707 DE2339707A1 (de) | 1973-08-06 | 1973-08-06 | Verfahren und vorrichtung zum verschweissen metallschichten enthaltender verbundfolien zu hohlkoerpern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE818506A true BE818506A (fr) | 1975-02-05 |
Family
ID=5888994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE147303A BE818506A (fr) | 1973-08-06 | 1974-08-05 | Procede et dispositif pour le soudage de feuilles composites contenant des couches metalliques en vue de l'obtention de corps creux |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5045062A (fr) |
| AR (1) | AR203488A1 (fr) |
| AU (1) | AU7142374A (fr) |
| BE (1) | BE818506A (fr) |
| CH (1) | CH568837A5 (fr) |
| DE (1) | DE2339707A1 (fr) |
| DK (1) | DK415774A (fr) |
| ES (1) | ES428978A1 (fr) |
| FR (1) | FR2240105A1 (fr) |
| IT (1) | IT1018815B (fr) |
| LU (1) | LU70664A1 (fr) |
| NL (1) | NL7410116A (fr) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3030595A1 (de) * | 1980-08-11 | 1982-03-04 | Mannesmann AG, 4000 Düsseldorf | Verfahren zur herstellung von innen und aussen mit kunststoff beschichteten korrosionsgeschuetzten mehrlagenrohren |
| DE3105146C2 (de) * | 1981-02-12 | 1983-07-14 | Automation Industrielle S.A., 1896 Vouvry | Verfahren und Vorrichtung zur kontinuierlichen Herstellung von endlosen verformbaren Rohren aus einem Laminatfolienband |
| DE3219749A1 (de) * | 1982-05-26 | 1983-12-01 | Robert Bosch Gmbh, 7000 Stuttgart | Vorrichtung zum verschweissen eines deckels mit einem behaelterrumpf |
| US4541891A (en) * | 1982-09-30 | 1985-09-17 | William C. Heller, Jr. | Method and apparatus for heat sealing plastic members |
| FR2577008B1 (fr) * | 1985-02-04 | 1987-09-25 | Commissariat Energie Atomique | Dispositif de fixation d'un tube par formation d'un bourrelet, procede de realisation dudit bourrelet, et dispositifs de mise en oeuvre du procede |
| JPH07108554B2 (ja) * | 1986-05-08 | 1995-11-22 | 株式会社新素材総合研究所 | 接着方法 |
| CH670988A5 (fr) * | 1986-10-15 | 1989-07-31 | Maegerle Karl Lizenz | |
| AU681398B2 (en) * | 1994-06-29 | 1997-08-28 | J.L. Howell | A fold-back pipe-joiner |
| EP1002580B1 (fr) * | 1998-11-18 | 2006-09-27 | Haldor Topsoe A/S | Méthode de production d'un objet comportant un revêtement de surface catalytique |
| NL1030304C2 (nl) * | 2005-10-28 | 2007-05-03 | Kok & Van Engelen Composite St | Werkwijze en inrichting voor het elektromagnetisch lassen van vormdelen uit thermoplastisch materiaal. |
| NL2000615C2 (nl) | 2007-04-26 | 2008-10-28 | Kok & Van Engelen Composite St | Werkwijze en inrichting voor het elektromagnetisch lassen van vormdelen. |
-
1973
- 1973-08-06 DE DE19732339707 patent/DE2339707A1/de active Pending
-
1974
- 1974-07-19 AU AU71423/74A patent/AU7142374A/en not_active Expired
- 1974-07-26 NL NL7410116A patent/NL7410116A/xx not_active Application Discontinuation
- 1974-08-02 IT IT52417/74A patent/IT1018815B/it active
- 1974-08-02 JP JP49088941A patent/JPS5045062A/ja active Pending
- 1974-08-02 CH CH1065974A patent/CH568837A5/xx not_active IP Right Cessation
- 1974-08-05 LU LU70664A patent/LU70664A1/xx unknown
- 1974-08-05 BE BE147303A patent/BE818506A/fr unknown
- 1974-08-05 FR FR7427120A patent/FR2240105A1/fr active Granted
- 1974-08-05 ES ES428978A patent/ES428978A1/es not_active Expired
- 1974-08-05 DK DK415774A patent/DK415774A/da unknown
- 1974-08-05 AR AR255053A patent/AR203488A1/es active
Also Published As
| Publication number | Publication date |
|---|---|
| AR203488A1 (es) | 1975-09-15 |
| ES428978A1 (es) | 1976-09-01 |
| DE2339707A1 (de) | 1975-02-27 |
| AU7142374A (en) | 1976-01-22 |
| LU70664A1 (fr) | 1976-08-19 |
| FR2240105A1 (en) | 1975-03-07 |
| CH568837A5 (fr) | 1975-11-14 |
| NL7410116A (nl) | 1975-02-10 |
| IT1018815B (it) | 1977-10-20 |
| FR2240105B3 (fr) | 1977-06-03 |
| JPS5045062A (fr) | 1975-04-22 |
| DK415774A (fr) | 1975-03-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FR2311661A1 (fr) | Procede pour ameliorer la resistance a la destratification d'un stratifie de pellicules etire | |
| MX7004E (es) | Mejoras en metodo para producir un articulo de acero pulvemetalurgico de gran contenido de carburo de vanadio | |
| BE818506A (fr) | Procede et dispositif pour le soudage de feuilles composites contenant des couches metalliques en vue de l'obtention de corps creux | |
| BE841179A (fr) | Composition et procede de fixation specifique pour la detecion d'un ligand dans un milieu liquide | |
| IL57427A (en) | Apparatus and process for the application of liquid in multiple streams to a moving strip | |
| FR2294732A1 (fr) | Dispositif pour inverser le sens d'ecoulement d'un liquide et son application a un procede de separation | |
| KE2875A (en) | Improvements in and relating to the conversion of liquid hazardous wastes to solid form | |
| ZA792723B (en) | Disposable product with fluid penetrating top sheet | |
| BE814345A (fr) | Procede et dispositif de fabrication d'un corps creux | |
| BE793948A (fr) | Composition a utiliser pour le soudage d'aciers inoxydables | |
| BE855417A (fr) | Determination de l'etouffement dans des systemes de comptage a scintillation liquide | |
| ZA74772B (en) | Improvements in or relating to ultrasonic welding processes and devices | |
| BE780536A (fr) | Procede de liaison d'un tube en niobium a un tube en acier inoxydable | |
| BE800016A (fr) | Procede et dispositif pour l'incorporation de matieres solides dans un bain de metal en fusion, | |
| FR2275564A1 (fr) | Alliages ferritiques de fer-chrome contenant de l'aluminium et du niobium | |
| BE844303A (fr) | Procede d'elimination de l'anhydride sulfureux contenu dans un gaz | |
| PT66416A (en) | Improvements in and relating to the production of composite containers | |
| ZA722641B (en) | Improvements in or relating to a method of forming a tubular member and the tubular member resulting therefrom | |
| BE804997A (fr) | Procede pour la preparation d'articles en matieres combustibles | |
| FR2349358A1 (fr) | Procede perfectionne pour eliminer les ions metalliques d'un liquide en contenant | |
| BE873438A (fr) | Procede et dispositif pour creer un espace creux dans l'ebauche d'un corps en ceramique fabriquee par le procede de coulee de barbotine | |
| BE821215A (fr) | Dispositif et procede pour l'ecrouissage en continu de matieres metalliques laminees en forme de barre | |
| BE793608A (fr) | Perfectionnements apportes aux dispositifs pour detecter la pression d'un liquide dans un recipient | |
| PT67669A (fr) | Bouee pour le support de tuyaux de oleoducts,de gas et similaires immerges dans l'eaux | |
| BE791080A (fr) | Procede et dispositif pour l'examen de la surface interne d'un corps creux |