... technology 4.ISO 9001:2000 5.Environment-friendly IGBT SOLID STATE POWER SOURCE Use IGBT power frequency multiplier circuit, ... of internal combustion engine components machinery, steel, silk heat treatment with heat treatment, etc; die, Standard hot pier, bar ... precious metal melting; Cable heat pipe: coated, etc.; PC steel bar piece.modified; High frequency hanguan. IGBT SOLID STATE POWER SOURCE