名词
中文翻译：真空硬化
同义词：
['vacuum treatment', 'vacuum quenching例句：1. The steel was subjected to vacuum hardening to improve its strength and durability.（钢铁经过真空硬化处理以提高其强度和耐用性。）2. During the manufacturing process', 'the metal parts were subjected to vacuum hardening to ensure their quality.（在制造过程中，金属部件经过真空硬化以确保其质量。）']
例句：
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1. The steel was subjected to vacuum hardening to improve its strength and durability.
钢铁经过真空硬化处理以提高其强度和耐用性。
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2. During the manufacturing process, the metal parts were subjected to vacuum hardening to ensure their quality.
在制造过程中，金属部件经过真空硬化以确保其质量。
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3.This method is widely used in the automotive industry for vacuum hardening of the engine components.
这种方法广泛应用于汽车工业中，用于发动机部件的真空硬化处理。