The SEM photos showed the surface of the stents turned from initially smooth into rough and the cross-sections turned from compact into porous during degradation.
电镜观察证实，每组胆总管内置支架表面随时间的延长由光滑变得粗糙，其截面由致密逐渐变得疏松。
The SEM photos showed the surface of the stents turned from initially smooth into rough and the cross-sections turned from compact into porous during degradation.
电镜观察证实，每组胆总管内置支架表面随时间的延长由光滑变得粗糙，其截面由致密逐渐变得疏松。
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