... 4.simple operation Usage:forging ,hardening metal Henan ,China Hot-selling High Frequency Induction Heating Power SupplyApplications :Quenching categories: ... variety of axle, leaf springs, fork, valve, rocker, ball stud and other auto parts quenching. 3. All kinds of engine ... tools quenchingDiathermy categories1. All kinds of bolt, nut hot forging; 2 hot-rolled cannabis cobalt; 3 diameter of 50 within ...