发布时间:2025-02-05 10:36:29
一般可以用天沟总长(mm)x截面展开(mm)x 厚度(mm)x 7.85 /1000000
天沟重量(T)=天沟总长(mm)x截面展开(mm)x 厚度(mm)x 7.85 /1000000
地质雷达探测初期支护纵向布线采用连续测量方式测量点距不宜大于多少
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