return speed meaning in Chinese

返回速度
回程速度

The first returning speed of null recurrent markov chains
链的首回速度
The air components are all takes the famous brand to use , the double regulator control the feeding speed and return speed effectively , the air - current added the aerosol device and it has the function of filter
气压元件全部采用进口件，质量可靠，另外增加双向调速阀，气路加装气雾润滑和气体滤水功能，方便铆接参数调整。