我觉得太粗了不好。同样的水量，粗管流速就低，流速低了就不容易把粪便赃物冲下去。

来源: QinHwang 于 2024-01-26 11:43:48 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

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