题目内容

地下防水工程施工时,卷材搭接长度应符合以下要求:高聚物改性沥青卷材为(),合成高分子卷材为100mm。

A. 50mm
B. 100mm
C. 150mm
D. 200mm

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防水混凝土必须采用高频机械振密实,振时间宜为(),以混凝土泛浆和不冒气泡为准,应避免漏振、欠振和超振。

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