干燥器恒温时,再生出口温度超过200℃以上要达()后才可降温。A.1hr B.2hr

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问题:

干燥器恒温时,再生出口温度超过200℃以上要达()后才可降温。

A.1hr

B.2hr

C.5hr

D.8hr

考点:乙烯装置操作工乙烯裂解气的处理乙烯裂解气的处理题库
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