名词
中文翻译：次要淬火
同义词：
['secondary tempering']
例句：
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1.The steel was subjected to secondary quenching to improve its hardness.
钢材经过二次淬火以提高其硬度。
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2. During the manufacturing process, the parts were subjected to secondary quenching to prevent cracking.
在制造过程中，零件经过二次淬火以防止开裂。
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3.The engineer explained that secondary quenching is used to remove internal stresses from the material.
工程师解释说，二次淬火是用来去除材料内部应力的。