... usage:harden,weld,forge,anneal and melt High Frequency Industrial HeaterApplications 1. Brazing categories:1.1 welding diamond saw ... , connecting rod, piston pin, crank pin, wheel, camshaft, valves, all kinds of rocker arm, rocker shaft; transmission of various ... and other high-frequency quenching.3.4 a variety of hydraulic components, pneumatic components of high frequency hardening heat treatment ...