互锁装置 meaning in English

interlocking device
interlocking mechanism

Features : hardened and precision - ground bedways , the spindle is supported with precision taper roller bearings , gears in the headstock are made of high - quality steel , hardened and ground , speed - changing levers driven by fan - shaped gears , operating easily , safe interlock and a overload safety devices in apron , electromagnetic braking , cooling and lighting devices are supplied
特点：床身导轨表面经淬火和精密磨削，主轴支撑采用精密圆锥滚子轴承，主轴箱内齿轮采用优质钢并经表面淬火和磨削，变速机构采用扇型齿轮传动，操作灵活方便，溜板箱设有安全互锁装置和过载保险机构，配有电磁刹车、冷却及照明装置。