防爆电动卷扬机
explosion-proof electric hoist
双筒电动卷扬机
double barrel electric hoist
起动电动机电磁线圈试验
starting motor solenoid test
起动电动机电磁线圈总成
starting motor solenoid assembly
直流发电机电动机组
Ward-Leonard converter unit
直流发电机-电动机组传动
DC generator-motor set drive
机动卷扬机
powered hoist
motor driven winch
mechanical capstan engine
差动复卷电动机
differential compound motor