摩擦滚 meaning in Chinese

friction roll

Overrunning clutch as output mechanism of pulse - type stepless transmission is friction roller - type mainly . because roller and output shaft contact with a higher pair , surface of output shaft appears groove mark obviously when repeated driving
脉动无级变速器的输出机构? ?超越离合器,目前主要是摩擦滚柱式超越离合器,由于滚柱与输出轴之间以高副接触,往复驱动下输出轴表面明显出现沟痕。