Constant speed drive, a hydro-mechanical component for changing variable engine gearbox speed to constant speed to drive the electrical power.

恒速驱动装置，将发动机齿轮箱的可变转速转变为恒速以驱动电源的液压机械式部件。

youdao

Apart from its use in power generating units and combined cycle power plants there emerged ever more cases of its application as a variable speed mechanical drive unit.

除用在燃气轮机电站及联合循环电站中外，同时也越来越多地用作变转速的机械驱动动力。

youdao