14. Which valve is used to adjust pressure, temperature and flow of fluid?
(A) Relief valve
(B) Regulating valve
(C) Reducing valve
(D) Needle valve

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統計： A(45), B(121), C(30), D(30), E(0) #1973882

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哪個閥門用於調節壓力，溫度和流體流量（A...
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