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tubular r filament 中空长丝
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The cradle is made from biological degradation material and has fasciculation and micro filament structure. The outside is coated by film. Thus, it forms tubular cradle.
所述的支架为生物降解材料制备的由微丝组成的束状微丝结构，其外表面包覆一层膜，形成管状支架。
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