晶粒度变小
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fine crystal size
细晶尺寸
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Another is that the hard phase and the soft phase both have microstructure with crystal grain of fine and homogeneous, and the size of crystal grain had better within magnitude of nanometer.
二是硬磁相和软磁相均要求有晶粒细小且分布均匀的显微结构特别是软磁相晶粒尺寸尽可能达到纳米尺寸。
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