Using nano-technology in surface, we are able to make metallic materials not only have surface nanocrystallization, but also macrocrystal basal body.
金属材料可以利用表面纳米化技术，制备出具有纳米晶相结构的表层，而基体仍
保持原有的粗晶状态。
Using nano-technology in surface, we are able to make metallic materials not only have surface nanocrystallization, but also macrocrystal basal body.
金属材料可以利用表面纳米化技术，制备出具有纳米晶相结构的表层，而基体仍保持原有的粗晶状态。
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