分级装置 meaning in Chinese

fractionator
grading plant

A study on the seed static cleaner - grader
种子静电清选分级装置的研究
Study on automatic control method of seeds grading device
种子精选分级装置自动控制方法研究
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。