名词
中文翻译：第二次回火箱同义词
同义词：
['tempering box', 'tempering furnace']
例句：
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1. The second tempering bin is used to heat the metal before it is machined.
第二个回火箱用于在金属加工前加热金属。
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2. The engineer carefully monitored the temperature in the second tempering bin during the process.
工程师在加工过程中仔细监控了第二个回火箱的温度。
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3. The second tempering bin was designed to improve the quality of the machined parts.
第二个回火箱的设计旨在提高加工零件的质量。