tach是什么意思

n.环,扣

1. The tach on the car dashboard shows the current RPM of the engine.
车辆仪表盘上的速度表显示发动机当前的转速。

2. Please make sure to record the lap times using the tach during the race.
请确保在比赛中使用计时器记录圈速。

计时器；速度表