... vavle. transmission within the various gears, shifting fork, spline shaft, gear axle, drive axle, small crank shaft pins, rocker, and other ... : for example:the plunger, rotor, reversing shaft in vavle,gear high-frequency hardening machine.all kinds of power tools ... : pliers and spanners heating-diathermy-forming.prospecting drill rod taper shank extrusion.steel tube’s diathermy and forming such as ...