SEM对试样微观形貌的研究表明，晶粒大小不均匀是这种材料的微观特征。

Research of SEM indicates that the heterogeneity of grain size is the typical microstructure of the materials.

youdao

SEM对试样微观形貌的研究表明，晶粒大小不均匀是这种材料的微观特征。

Research of SEM indicates that the heterogeneity of grain size is the typical microstructure of the materials.

youdao