【单选题】【消耗次数:1】
一般情况下,泵送混凝土的粗骨料粒径应控制在 D(D为管径)范围内,且最大粒径不得超过规范的规定。( )
0.2~0.3
0.3~0.4
0.4~0.5
0.5~0.6
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相关题目
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