O-1：油硬级(OiL-hardening types)的工具钢材使用最广泛，而其中最佳者是O-1型，其高锰伴同铬与钨可增加硬化能，使钢材可不需剧烈的水淬也能硬化到HRC62的高硬度。
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Hardening the types also provides a well-known service interface that is easy to consume in integration middleware and presentation logic.
固定产品类型提供了一个良好的服务接口，易于在集成中间件和表示逻辑中使用。
You'll find these utilities divided into three types within the article: hardening tools, Firefox tools, and Firefox add-ons.
本文将这些实用程序分为三大类：增强工具、Firefox工具和Firefox增件。
It is found that the relationship between cutting stress and displacement can be divided into two types of gradually hardening and softening alter peak value.
由试验资料发现，剪切面上的剪切应力与剪切位移关系可分为逐渐硬化和峰值后软化两种类型。
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