CPC Subgroup
C21D 9/30 for crankshafts; for camshafts
Full Title
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor > for crankshafts; for camshafts
C21D 9/30 Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor > for crankshafts; for camshafts