| 摘要 |
A process for making thin metal tubing as a sheath for electrical cable or as a conduit, wherein very thin metal foil is continuously converted into tubular sheathing as over an electrical cable core, the longitudinal edges of the foil being overlapped and welded, with the immediate application thereafter of a thermoplastic copolymer coating which is tightly adherent to the metal surface of the sheathing, the composite metal foil-plastic tubing having substantially increased mechanical strength.
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