diaphragm vacuum gauge

例句：

1. 1. The engineer used the diaphragm vacuum gauge to check the air pressure in the engine compartment.
   工程师使用隔膜真空表检查发动机舱内的空气压力。
2. 2.During the maintenance, the technician found a small leak in the diaphragm vacuum gauge.
   在维护过程中，技术员发现隔膜真空表有一小处泄漏。
3. 3. The diaphragm vacuum gauge was used to monitor the level of oil in the engine.
   隔膜真空表用于监测发动机油的水平。