APP There are many variations in the design of the screw type positive displacement, rotarypump. The primary differences consist of the number of intermeshing screws involved, thepitch of the screws, and the general direction of fluid flow. Two common designs......（本文共 2849 字, 2 張圖） [閱讀本文] >>
說明： 本文檔由創作者上傳發布，版權歸屬創作者。若內容存在侵權，請點擊