Nearly all civil engineering structures, ro of s, roads, and any concrete work have a run - off coefficient of about 95 per cent.

几乎所有的土木工程构筑物，屋顶、道路和所有的混凝土工程，其径流系数均为95左右。

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Nearly all civil engineering structures, ro of s, roads, and any concrete work have a run - off coefficient of about 95 per cent.

几乎所有的土木工程构筑物，屋顶、道路和所有的混凝土工程，其径流系数均为95左右。

youdao