air tight test

• 气密性试验

air tight test的用法和样例：

例句

1. The special connections ensure that the system has excellent air tightness.
   特别的连接方式保证了系统优良的气密性。
2. The principle of a composite test device for air-tightness of automobile compartments and air volume of air conditioners was described.
   摘要论述了客车车室气密性和车用空调风量综合试验装置的原理。