B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
26/155
B21D 22/02 (2006.01)
Patent
CA 1257078
METHOD OF MAKING A MULTIPLE RIGID CONCENTRIC TUBE SYSTEM ABSTRACT OF THE DISCLOSURE A compound tube system is made basically in the manner in which an inner tube or tube section is coated with a synthetic inserted into a tube of slightly larger diameter, whereupon the second tube is drawn onto the synthetic coating to obtain a compound tube; the method can be repeated to build up a larger compound system. -1-
458276
Holtorf Franz-Josef
Schmidtchen Hans M.
Kabel & Metallwerke Gutehoffnungshuette Ag
Smart & Biggar
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