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[单选题]合金渗碳钢渗碳后必须进行____后才能使用。( )的答案是什么?
问题:
[单选题]合金渗碳钢渗碳后必须进行____后才能使用。( )
A、淬火加低温回火;
B、淬火加中温回火;
C、淬火加高温回火。
参考答案: A
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