正确答案: A
蒸汽压力有所降低时可获得更多余热和废气锅炉蒸发量
题目:废气锅炉的蒸汽压力和蒸发量的选择应是()。
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学习资料的答案和解析:
[单选题]某设备的λ=0.0001,工作时间为50O0h,则R(5000)为()。
0.6065
[单选题]Which of the following may lead to the engine NOT to start on air?()
three of the six starting valves stuck
[单选题]If the temperature drops low enough, oil will not flow, () just tell us the temperature.
Pour point
[单选题]Camshafts are usually driven by timing gears or ().
chain drives