liquid level gauge

例句：

1. 1.The engineer used a liquid level gauge to check the level of oil in the tank.
   工程师使用液位计检查油箱中的油位。
2. 2.The doctor measured the blood pressure with a liquid level gauge.
   医生用液位计测量血压。
3. 3.The chemical factory uses a liquid level gauge to monitor the level of chemicals in the tanks.
   化工厂使用液位计来监控罐中化学物质的水平。