... 3.Mosfet technology 4.ISO 9001:2000 5.Environment-friendly Small size solid high-frequency heating power (super audio power)Use ... stone blades, serrated, carbide cutting tools, roller, edge grinding wheel welding heat; Rolling straight handle manual twist drill, pliers, wrench ... , screw and other kinds of tools heat treatment; Gear, wheel machine, such as gave parts, shaft parts of internal combustion ...