Objective To estimate onsite dust allowableconcentration in railway tunneling.
目的估算铁路隧道现场粉尘容许浓度。
2
Objective To study the effect of low concentration CO on neurobehaviour function and the maximal allowableconcentration(MAC) in limited time.
目的研究低浓度一氧化碳（ C O） 的神经行为毒理学效应及限时最大容许浓度（ M A C） 。
3
The cost for the deposition of the waste depends also upon the volume of the storage cavities and the maximum allowable radioactive concentration of the waste.