The auxiliary shaft topsoil adopted ordinary construction and drainages in hygrometric well.屯留煤矿副井井筒表土段采用普通法施工,利用井外降水井疏干降水.This causes environmental damage when the topsoil is washed away by the rains.雨水冲走表层土壤会造成环境破坏。The...
在工业过程中, 常用精馏作用把液体混合物分离为纯组分.In industrial processes, liquid mixtures are often separated into their pure components by distillation.讨论用于甲醇生产主精馏塔改进工艺条件下的智能控制方法.An intelligent control method for operation of methanol refini...