CPC Subgroup
C21D 1/19 by interrupted quenching
Full Title
General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering > Hardening (C21D1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D1/62) > by interrupted quenching
2 direct subcodes
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