CPC Subgroup
C21D 1/673 for die quenching
Full Title
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Quenching devices > for die quenching
C21D 1/673 General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Quenching devices > for die quenching