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
私人筆記 (共 3 筆)
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每當可能出現不希望的流量逆轉時,應安裝何...
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當可能出現不希望的流動逆轉時,應安裝哪種...
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Which type of valve...