... fine soil grains 细土粒 ultra-fine grains 超细晶粒 coarse and fine grains 粗细颗粒 ...
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Ultra steel is characterized by its higher cleanness and ultra-fine grain, thus it has higher strength, toughness and longer life even without addition of more alloying elements.
超级钢的主要特征是高洁净度和超细晶粒组织，在不增加任何合金元素的情况下，其强度、韧性和使用寿命提高一倍。
参考来源 - 400MPa级超级钢激光焊接及其焊接性研究·2,447,543篇论文数据，部分数据来源于NoteExpress
探索了在新一代钢中获得超细晶粒的方法。
The methods to obtain ultrafine grain in new generation steel were investigated.
研究了超细晶粒钢筋焊接接头的组织和力学性能。
The microstructure and mechanical properties of welded joint of ultra-fine grained rebar were studied.
超细晶粒钢可在降低汽车制造成本方面发挥其优势。
Ultrafine grain steel can play an important role in reducing automobile production cost.
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