General;Reciprocating;Reciprocating Diaphragm;Turbo;Positive Displacement;Roller Vane;Rotary;Screw;Liquid Ring;Ejector

• 常规;往复式;往复隔膜式;涡轮式;正排量式;滚压叶轮式;旋转式;螺旋式;液圈式;喷射式