我覺得太粗了不好。同樣的水量，粗管流速就低，流速低了就不容易把糞便贓物衝下去。

來源: QinHwang 於 2024-01-26 11:43:48 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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