... 9001:2000 5.Environment-friendly IGBT SOLID STATE POWER SOURCE Use IGBT power frequency multiplier circuit, innate Switzerland drive circuit, ... heat treatment; Gear, wheel machine, such as gave parts, shaft parts of internal combustion engine components machinery, steel, silk heat ... and nuts; temperature pier Valve, screw end, gear, auto parts machine, bed guide quenching; Metal thin tape annealing; A ...