阿摩線上測驗
3. What following set of pumps is positive displacement type？
(A) Rotary pump and Reciprocating pump
(B) Centrifugal pump and Injection pump
(C) Centrifugal pump and Rotary pump
(D) Volute pump and Injection pump
答案：登入後查看
統計： A(0), B(0), C(1), D(0), E(0) #3833307
統計： A(0), B(0), C(1), D(0), E(0) #3833307
