Exhaust Gas Passage with Variable Pressure: It is adopted to prevent foul air from toilet and kitchen; check valve is added at the joint.是什么意思_Exhaust Gas Passage with Variable Pressure: It is adopted to prevent foul air from toilet and kitchen; check valve is added at the joint.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句