水往低處流，roof vent堵了說明下麵的管子先堵了，應該要全部通。老實說，全部通才一千多是很便宜的了。

來源: 徒勞於 2025-05-02 15:16:32 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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