无调速状态 governor free state

无级调速 step less speed regulating ; stepless speed variation ; stepless timing

无极调速 Speed Promise ; stepless speed regulation ; Stepless

无级调速车床 stepless speed regulation lathe

无差调速器 zero droop governor

无级调速伺服电动机 stepless servo-motor

无定向调速器 astatic governor

电压无刷电子调速器 OPTO

无段调速 stepless speed regulation

变频器闭环无级调速 Closed loop