CPC Subgroup
B21D 13/06 by drawing
Full Title
Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form (tubes B21D15/00) > by drawing
B21D 13/06 Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form (tubes B21D15/00) > by drawing