短语词组短語stepless servo -motor 無級調速伺服電動機Electric servo -motor 電動伺服電機servo dc motor 直流伺服電機micro servo -motor 伺服微電機air servo -motor 氣動伺服馬達AC Servo Control Motor 交流伺服Ac servo -motor 交流伺服電機Servo &Motor Drives 舵機 返回 servo motor