n.坚固,紧密;紧致;密封性;
例句:
Special connections ensure that the system excellent air tightness.
特别的连接方式保证了系统优良的气密性.
Cleaning and tightness test should be done about correlation piping.
3相关管路清洁完毕,并经过密性试验、验收结束.
Presents the management methods of air tightness and vacuum degree.
介绍了机组气密性管理和真空度管理的方法.