动词短语
中文翻译：热处理
同义词：
['harden', 'temper']
例句：
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1. The steel was hot peened to improve its strength.
钢材经过热处理以提高其强度。
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2. The tool was hardened by hot peening before being used.
工具在使用前通过热处理硬化。
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3. The metal was tempered to achieve a smoother finish.
金属经过热处理以获得更光滑的表面。