magnetic tachometer电磁转速表;磁力转数计;磁力转速表;磁转速计
hydraulic tachometer[机] 液压转速计;水力转速计;液压测速仪
optical tachometer光学转速计
transient tachometer瞬态转速仪
tachometer indicator转速表;转速表指示器
stroboscope tachometer闪光式转速仪
ENGINE TACHOMETER发动机转速表;策念头转速表
punp tachometer泵转速计
N-COUNT（可数名词） A tachometer is an instrument in a car or an aeroplane which shows the speed of the engine. 转速计 [美国英语]
The tachometer registers a rather high 3,000 rpm at 70 mph.
转速计在时速70英里时显示每分钟高达3000转。