(A)齒輪泵 (B)真空泵 (C)管道泵 (D)螺桿泵
(A)單吸螺桿泵 (B)雙吸螺桿泵 (C)三吸螺桿泵 (D)多吸螺桿泵
(A)結(jié)構(gòu)簡單緊湊 (B)揚程高 (C)轉(zhuǎn)速不宜過高 (D)有自吸能力