CPC Subgroup
C21D 1/30 Stress-relieving
Full Title
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of annealing > Stress-relieving
C21D 1/30 General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Methods of annealing > Stress-relieving