A.葉輪 B.閥門 C.水箱 D.氣水分離器
A.水環(huán)式真空泵 B.離心泵 C.齒輪泵 D.螺桿泵
A.0.1~0.2mm B.0.1~0.3mm C.0.2~0.4mm D.0.2~0.5mm