水力分级 meaning in English

hydraulic cla ification
hydraulic classification
hydrauliccla ification

Performance evaluation of washery hydraulic classifiers
选煤厂水力分级设备.工艺效果评定方法
Aiming at the problems exiting in grain classification at present , a vertical multistage waterpower device was developed to realize abrasive narrow - grade - classification
本文主要针对目前磨料微粉分级存在的困难，自行研制了垂直式多级水力分级装置来实现磨料微粉的窄粒级分级。
The loss with time was put forward to value dispersion . the second part is about classifying the super - fine powder . due to the abrasive grain being hard , seriously wearing the equipment and requiring the narrow - grade , a new - type of vertical multistage waterpower system was developed
针对磨料硬度大对分级设备磨损严重、磨料微粉属于窄粒级分级产品而设计出一种新型垂直式多级水力分级系统，该系统主要特点： 1 、垂直式多级分级。