... .C: forging, shaping, warm bending, high frequency shrinkage fitting, heat enveloping, heat sealing, metal desiccating, nut inserting, rotor inserting,etc.D: precious metals ... coating, warm resin forming,shrinkage fitting & Extraction ect.Heat treating services including HSS Heat Treatment, Induction Hardening, Hardening and Tempering, Gas Carburizing, Case ...