• This paper made some investigation about the permissible concentration limits about contaminations in roadway tunnel from the point of view of the effects on the body.

    本文针对隧洞特点依据保障隧道内乘驶机动车各人员健康、卫生和隧道营运安全为原则污染物浓度设计限值进行研究

    youdao

  • The safety situation of karst tunnel is the most serious and headache problem from the point of view of safety situation in construction industry field.

    建筑业安全现状分析,岩溶隧道安全现状令人担忧。

    youdao

  • The safety situation of karst tunnel is the most serious and headache problem from the point of view of safety situation in construction industry field.

    建筑业安全现状分析,岩溶隧道安全现状令人担忧。

    youdao

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