阿摩線上測驗
5. What equipment is used to relieve excess pressure？ It only fitted on top of boiler and prevents pressure to excess in boiler.
(A) Quick closing valve
(B) Relief valve
(C) Globe valve
(D) Safety valve
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統計： A(6), B(23), C(4), D(163), E(0) #3833309
統計： A(6), B(23), C(4), D(163), E(0) #3833309
