CPC Subgroup
B21D 1/14 Straightening frame structures
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) > Straightening frame structures
1 direct subcode
Child Classifications
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