正排量自吸分级腔螺旋形迥转泵
positive displacement self-priming progressive cavity rotary pump
振动分级
vibration separation
classification due to vibration
照蛋分级图
colo(u)red egg-candling chart
egg -candling chart
colored egg-candling chart
coloured egg-candling chart
粘土分级评价法
method of grading mud-making clay
粘多糖分级
Classification precipitation of glycosaminoglycan