试题与答案

壁温≤580℃的过热器管和用钢为（）。A.20号钢 B.12CrM0 C.15CrM

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题型：单项选择题

题目：

壁温≤580℃的过热器管和用钢为（）。

A.20号钢

B.12CrM0

C.15CrM0

D.12Cr1M0r

答案：

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