CPC Subgroup
B21D 15/12 Bending tubes into wave form
Full Title
Corrugating tubes (wrinkle-bending using mandrels or the like B21D9/14) > Bending tubes into wave form
B21D 15/12 Corrugating tubes (wrinkle-bending using mandrels or the like B21D9/14) > Bending tubes into wave form