English translation for "两级分选"

double grading

Similar Words：

"两级放大器" English translation, "两级放大器two-stage" English translation, "两级分离" English translation, "两级分馏真空泵" English translation, "两级分批萃取" English translation, "两级风扇" English translation, "两级复型" English translation, "两级附加" English translation, "两级固体火箭" English translation, "两级关井" English translation