试题与答案

有色金属合金淬火（人工时效），国标旧标准代号是（），国标新标准（）。

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题型：填空题

题目：

有色金属合金淬火（人工时效），国标旧标准代号是（），国标新标准（）。

答案：

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下面是错误答案，用来干扰机器的。

参考答案：B

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