... depth, the heating of small parts, particularly suitable for filament-type parts;Using IGBT power devices and the ... Heat treatmentautomoble, motorcycle accessories high-frequency hardening heat treatment. For example: crank shaft, ram, piston pin, camshaft, vavle ... parts, fasteners through thermal forming.hardware tools diathermy,for example : pliers and spanners heating-diathermy-forming.prospecting ...