矿井有效风量率不低于95%
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
有一两级除尘系统,系统风量为2.22m3/s,工艺设备产尘量为22.2g/s,除尘器的除尘效率分别为80%和95%,该除尘系统的排空浓度为( )。
免费的网站请分享给朋友吧