33. Which type of valve should be installed whenever an undesired reversal of flow is
possible?
(A) Throttle valve
(B) Stop valve
(C) Check valve
(D) Relief valve
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統計: A(40), B(51), C(283), D(40), E(0) #1512195
統計: A(40), B(51), C(283), D(40), E(0) #1512195