专利名称：TUBULAR METAL STRUCTURE发明人：ZIEMEK G,DT,NORDMANN G,DT申请号：US3710828D申请日：19710125公开号：US3710828A公开日：19730116
摘要：A tubular metal structure formed from a steel tape converted to tubular shapewith the side edges thereof in abutting relation to provide a longitudinal seam which iswelded. The tubing may be transversely corrugated to increase the flexibility thereof; thetubing in plain or corrugated from being useful as conduit means or as sheathing forelectrical cable. The steel from which the tape is formed has a specified carbon,manganese and silicon content to improve diverse properties of the fabricated tubing,including the welded seam thereof and the welding procedure.
申请人：KABEL UND METALLWERKE GUTEHOFFNUNGSHUTTE AG,DT
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