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 minimum permissible oxygen concentration for unprotected personnel is 19.5%, while the maximum is23.5%.
对于没有受到保护的人来说，允许的最小氧浓度是19.5%，最大是23.5%。
This Standard specifies the supreme permissible effluent concentration of flue dust, SO2 and nitrogen oxides as well as the emission limits of flue gas blackness by age limits.
本标准分年限规定了锅炉烟气中烟尘、二氧化硫和氮氧化物的最高允许排放浓度和烟气黑度的排放限值。
The low dust collecting efficiency of ESP system of clinker kiln results in that dust emission concentration exceeds permissible standard.
氧化铝熟料窑电收尘系统收尘效率低，导致烟尘排放浓度超标。
The low dust collecting efficiency of ESP system of clinker kiln results in that dust emission concentration exceeds permissible standard.
氧化铝熟料窑电收尘系统收尘效率低，导致烟尘排放浓度超标。
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