.自動空氣排放閥 (A.A.V)
回答 (1)
2007-08-20 7:38 am
✔ 最佳答案
Automatic air vents (AAV) are designed to vent air from both open and sealed plumbing systems. They should be mounted in a vertical position where air is collected naturally in the pipe system.
參考: WEB & Myself
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https://hk.answers.yahoo.com/question/index?qid=20070808000051KK01900