原本想装个止回阀/单向阀，一来担心压力不够反倒排水不畅，加之适合的口径难找就作罢了！

来源: Oneshotkill 于 2016-02-01 06:16:49 [旧帖] [给我悄悄话] 本文已被阅读：次

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