... accessories high-frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, vavle. transmission within the ... various gears, shifting fork, spline shaft, gear axle, drive axle, small crank shaft pins, rocker, and other accessories ... , spanner.hydranlic components: for example:the plunger, rotor, reversing shaft in vavle,gear high-frequency hardening machine.all kinds ...