The special connections ensure that the system has excellent air tightness. 特別的連接方式保證了系統優良的氣密性。
The principle of a composite test device for air-tightness of automobile compartments and air volume of air conditioners was described. 摘要論述了客車車室氣密性和車用空調風量綜合試驗裝置的原理。
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