阿摩線上測驗
23. Which type of valve should be installed where an undesired reversal of flow is restricted on the
piping line?
(A) Sluice valve
(B) Needle valve
(C) Check valve
(D) Globe stop valve
答案：登入後查看
統計： A(32), B(63), C(766), D(121), E(0) #3126424
統計： A(32), B(63), C(766), D(121), E(0) #3126424
