【判断题】【消耗次数：1】
排水立管与干管的连接采用90度弯头
①
正确
②
错误
参考答案：
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相关题目
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排水系统的3立管系统是指（ ）。
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2根通气立管与1根污水立管结合的系统
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2根污水立管与1根通气立管结合的系统
③
2根废水立管与1根通气立管结合的系统
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1根通气立管与1根污水立管1根废水立管结合的系统
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asold as
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