timer tube

例句：

1. 1. The timer tube is used to measure the time when a device is in use.
   计时管用于测量设备使用的时间。
2. 2. The engineer used the timer tube to control the timing of the machine.
   工程师使用计时管来控制机器的计时。
3. 3. The timer tube was used as a way to measure the time between events.
   计时管被用作测量事件之间时间的一种方式。