名词
中文翻译：直接热处理
同义词：
['direct heat treatment', 'direct quenching']
例句：
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1. The steelwas subjected to direct tempering at high temperatures to improve its strength and toughness.
钢铁在高温下经过直接热处理以提高其强度和韧性。
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2. Direct tempering is a technique used in metallurgy to enhance the properties of materials.
直接热处理是一种冶金技术，用于提高材料的性能。
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3.During the manufacturing process, direct tempering is often used to produce parts with specific mechanical properties.
在制造过程中，经常使用直接热处理来生产具有特定机械性能的部件。