名词短语中文翻译
中文翻译：重复回火
同义词：
['repeated heating', 'repeated heat treatment']
例句：
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1. Thesteel was subjected to repeated tempering to improve its strength and toughness.
钢材经过反复回火以提高其强度和韧性。
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2.During the manufacturing process, the metal is subjected to repeated tempering to achieve the desired properties.
在制造过程中，金属需要经过反复回火以达到所需的性能。
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3. The engineer explained that the material underwent repeated tempering to reduce its internal stresses.
工程师解释说，这种材料经过了反复回火以减少其内部应力。