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【单选题】
有两台同样的列管式换热器用于冷却气体,在气、液流量及进口温度一定的情况下,为使气体温度降到最低,拟采用( )。A.
气体走管内,串连逆流操作
B.
气体走管内,并连逆流操作
C.
气体走管外,串连逆流操
D.
气体走管外,并连逆流操作
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