CPC Subgroup
C21D 9/34 for tyres; for rims
Full Title
Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor > for tyres; for rims
C21D 9/34 Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor > for tyres; for rims