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| grain size controller (These materials include deoxidizer, carburizers, grain size controllers, elements to improve machinability, elements to accentuate the inherent desirable properties characteristic of the principal alloying constituents, etc. 这些物质包括脱氧剂、渗碳剂、晶粒度控制剂、改善机加工性能的元素以及增强主要合金组分原有良好性能的元素。) | |||
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