vacuum testing

例句：

1. 1. This vacuum testing equipment is designed to detect any leaks in the air.
   这种真空测试设备旨在检测空气中的任何泄漏。
2. 2. The company conducted a vacuum testing of its new product before it was released.
   该公司在产品发布前进行了真空测试。
3. 3. During the vacuum testing, we found that the device had some minor issues with its sealing mechanism.
   在真空测试过程中，我们发现该设备在密封机制方面存在一些轻微的问题。