15.下列何者是自然循環水管鍋爐,其安全設計上最終極限的限制?
(A)爐水循環極限(End point for water circulation)
(B)水分攜帶極限(End point for moisture carry over in steam)
(C)過給空氣極限(End point for excess air)
(D)燃燒極限(End point for combustion)
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統計: A(0), B(0), C(0), D(2), E(0) #1205961
統計: A(0), B(0), C(0), D(2), E(0) #1205961