单选题Fins are installed on the fireside of water-tubes used in waste boiler to（）Adecrease the velocity of gases flowing past the tubesBincrease the rate of heat transferCreduce accumulations carbon depositsDdirect the flow of gases
单选题
Fins are installed on the fireside of water-tubes used in waste boiler to（）
A
decrease the velocity of gases flowing past the tubes
B
increase the rate of heat transfer
C
reduce accumulations carbon deposits
D
direct the flow of gases
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