air tightness test

例句：

1. 1. The engineer conducted an air tightness test on the new door.
   工程师对新门进行了气密性测试。
2. 2.During the installation, the technician performed an air tightness test to ensure everything was sealed properly.
   在安装过程中，技术员进行了气密性测试，以确保一切都被正确密封。
3. 3. The manufacturer insisted on conducting an air tightness test before shipping out the product.
   制造商坚持在发货前进行气密性测试。