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预埋排水防水套管，如何定位标高尺寸，这样做很简单
在防水要求较高的排水管道安装时，施工和设计规范规定，经过地下室或其它外墙时，必须安装防水套管，那么排水出户管标高和水平尺寸、洞口大小如何确定？
如何定位坐便器洁具尺寸，最短距离多少为合适？34/72
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