名词短语
中文翻译：分级硬化
同义词：
['分级处理，分级硬化例句：1. The steel was graded hardening to achieve the required strength.（钢材经过分级硬化处理以达到所需的强度。）']
例句：
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1. The steel was graded hardening to achieve the required strength.
钢材经过分级硬化处理以达到所需的强度。
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2. Theprocess of grading hardening iscrucial for the quality of the final product.
分级硬化过程对于最终产品的质量至关重要。
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3. Theengineers carefully graded hardening themetal to ensure its durability.
工程师们仔细分级硬化金属以确保其耐用性。