每分钟转数r.p.m.(revolutions per minute)
【物理】旋转REVOLUTIONS
每秒钟转数rps.(revolutions per second)
每分钟转数revolutions per minute
【机械工程】转数reciprocating-piston machine or engine number of revolutions
转/分，每分钟转数R/m;rpm.(revolutions per minute)
转数number of revolutions
每秒转数revolutions per second