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.
本文针对该隧洞的特点依据保障隧道内乘驶机动车各人员健康、卫生和隧道的营运安全为原则对污染物浓度设计限值进行了研究。
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.
从建筑业的安全现状分析，岩溶隧道的安全现状最令人担忧。
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.
从建筑业的安全现状分析，岩溶隧道的安全现状最令人担忧。
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