n.不透氣；氣密；密封

The special connections ensure that the system has excellent air tightness. 特別的連接方式保證了系統(tǒng)優(yōu)良的氣密性。

Compressed air testing can be carried out only, if accepted by the classification society. 如果船級(jí)社同意，可以只做氣密試驗(yàn)。

Seat tightness achieved with torque as opposed to line pressure. 利用扭矩而不是管路壓力來實(shí)現(xiàn)閥座的密封。

When all air has been removed, the vessel is sealed off. 把全部空氣抽走后，將容器密封起來。