CPC Subgroup
B21C 37/12 Making tubes or metal hoses with helically arranged seams
Full Title
Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape > of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes > Making tubes or metal hoses with helically arranged seams
7 direct subcodes
Child Classifications
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