【判断题】【消耗次数:1】
塑料污水排水立管上宜每6层设置一个检察口。( )
正确
错误
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相关题目
【单选题】 塑料排水立管宜每()层设置一个检査口。
① 
② 
③ 
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【单选题】 排水立管上的清通装置是
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【单选题】 排水立管一般不允许转弯,当上下层位置错开时,宜用乙字弯或( )连接。
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【单选题】 排水立管一般不允许转弯,当上下层位置错开时,宜用乙字弯或连接
①  90度弯头
②  一个45度弯头
③  两个45度弯头
④  两个90度弯头
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