多谢波大。我发的那个图片里，右边有个直的管道，中间那个应该就是个clean out吧，我应该可以从那里清理下游的管道吧

来源: 千里江山_USA 于 2024-11-28 19:05:55 [旧帖] [给我悄悄话] 本文已被阅读：次

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