CPC Subgroup
B21C 37/20 Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies
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 of special shape; Making fittings > Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies
3 direct subcodes
Child Classifications
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