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METHODS:The bilayer minipellet was prepared and shaped by pressurizing gel with the collagen protein as coating material and the sodium chondroitin sulfate as releasing moderator;
方法：以胶原蛋白为包裹材料，以硫酸软骨素钠为释放调节剂，采用凝胶加压成型的方法制备双层微条；
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