转速 zhuànsù rotational speed Definitions Defs Origin Strokes Stroke Words Sentences Sents 转速表 zhuànsùbiǎo tachometer tachometer or instrument used to measure and display the rotation speed of a mechanical or electrical system; RPM gauge转速计 zhuànsùjì tachometer An instrument used in electrical or mechanical systems to measure and display rotational speed.
