engine vacuum checking gauge

例句：

1. 1. The engineer vacuum checker was used to inspect the engine's performance.
   工程师用真空检查器来检查发动机的性能。
2. 2. The engineer vacuum checker detected a minor leak in the engine.
   工程师使用的真空检查器在发动机中发现了一个小泄漏。
3. 3.The engineer vacuum checker helped identify the root cause of the engine's failure.
   工程师用的真空检查器帮助确定了发动机故障的根本原因。