liquid level gauge of low pressure

例句：

1. 1. Theengineer used a liquid level gauge to check the level of oil in the tank.
   工程师使用液体水平计来检查油箱中油的水平。
2. 2. The doctor placed a liquid level gauge on the patient's wrist to monitor his blood pressure.
   医生将液体水平计放在病人手腕上，以监测他的血压。
3. 3. The chemical manufacturer uses liquid level gauges to ensure accurate filling of containers.
   这家化学制造商使用液体水平计来确保容器的准确填充。