liquid level gauge with float

例句：

1. 1. The engineer used a liquid level gauge to check the level of the oil in the tank.
   工程师使用液体水平仪检查油箱中油的水平。
2. 2. The factory uses a liquid level gauge to monitor the level of its production process.
   工厂使用液体水平仪监控其生产过程的水平。
3. 3. The doctor recommended a liquid level gauge for monitoring the patient's vital signs.
   医生推荐使用液体水平仪来监测病人的体征。