目的估算铁路隧道现场粉尘容许浓度。
Objective To estimate onsite dust allowable concentration in railway tunneling.
本文还探讨了饮用水中二种受试物质最高容许浓度的安全性问题。
We've also approached the safety of maximum acceptable concentration of CHCl 3 and CCl 4 in drinking water.
目的研究低浓度一氧化碳（ CO）的神经行为毒理学效应及限时最大容许浓度（ M A C） 。
Objective To study the effect of low concentration CO on neurobehaviour function and the maximal allowable concentration(MAC) in limited time.
目的研究低浓度一氧化碳（ CO）的神经行为毒理学效应及限时最大容许浓度（ M A C） 。
Objective To study the effect of low concentration CO on neurobehaviour function and the maximal allowable concentration(MAC) in limited time.
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