... 9001:2000 5.Environment-friendly IGBT SOLID STATE POWER SOURCE Use IGBT power frequency multiplier circuit, innate Switzerland drive circuit, ... blades, serrated, carbide cutting tools, roller, edge grinding wheel welding heat; Rolling straight handle manual twist drill, pliers, wrench, ... die, Standard hot pier, bar stock hot forging, bolts and nuts; temperature pier Valve, screw end, gear, auto parts ...