CPC Subgroup
B21D 1/02 by rollers (B21D1/06 takes precedence)
Full Title
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom (B21D3/00 takes precedence); Stretching sheet metal combined with rolling (working sheet metal of limited length by stretching B21D25/00; by localised hammering B21D31/06) > by rollers (B21D1/06 takes precedence)