turn meter

例句：

1. 1. The car's turn meter is showing the speed limit.
   汽车的转速表显示了限速。
2. 2. The engineer used a turn meter to measure the distance traveled.
   工程师使用转速表测量了行驶的距离。
3. 3.The driver quickly checked his turn meter before entering the roundabout.
   司机在进入环形交叉口前快速检查了他的转速表。