(A)腰輪和殼體 (B)計(jì)量腔 (C)腰輪 (D)轉(zhuǎn)子
(A)單腰輪 (B)雙腰輪 (C)三腰輪 (D)2對(duì)腰輪
(A)0.05MPa (B)0.1MPa (C)0.3MPa (D)0.5MPa