天面雨水管是从天面往下布置的吗？？？？？？？？？？？

我真的有点心灰意懒了，我除了来这里发篇帖子还能做什么呢？没准我的帖子也会被和谐掉。就算没有和谐掉，我会不会被打击报复？我不敢想。
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wangnongqin2013 发表于 2014-3-9 20:29 “建筑有负一层，且负一层有卫生间”,假如其地面标高低于室外地坪,且,不能直接将污水排出时,地下室污水应单独 …恩恩，好的，O(∩_∩)O谢谢