扫描电镜显示：断口有明显的撕裂纹和纤维状组织。

Obvious tearing crack and fiber tissue was observed by scanning electric microscopy.

youdao

扫描电镜显示：断口有明显的撕裂纹和纤维状组织。

Obvious tearing crack and fiber tissue was observed by scanning electric microscopy.

youdao