Help me to translate,please
It's a requirement for bainite:Bainite - The case microstructure must be free of bainite in the outer 3/4 of the effective case depth.
How to translate "in the outer of ..."? 3/4有效硬化深度外无贝氏体组织 也就是說只允許有效深度中靠近內部的1/4可含有贝氏体. 我认为是:从表面至1/4有效层深处不能有贝氏体 从表面到有效渗碳层四分之三处不能出现贝氏体组织。
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