Use the method of the frequency governor with machine speed. Bring about a stepless regulation of all constantpower range, in the rotating main movement of universal machine tools.
用变频调速和机械变速相结合的方法，在主运动为旋转运动的通用机床中，实现全部恒功率范围内的无级调速。
2
In view of the shortcomings in the design of rail Pushers, a hydraulic pusher for long rail was designed according to the principle of hydraulic constantpowerspeedregulation.