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OBJECTIVE To prepare controlled - release delivery systems with drug gradients using three dimensional printing technique.

目的研究利用三维打印成形技术制备具有药物梯度特征的控释给药系统.

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AIM : To use three dimensional printing ( 3 DP ) technology to prepare zero - order controlled - release tablets of helicoid.

目的: 应用三维 打印技术 制备豆腐果苷零级控释片.

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