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对空心叶片模型型腔和加强筋结构设计参数进行了分析；
The design parameters of chamber and stiffener of hollow blade model were analyzed.
方法：向24只兔右膝关节腔内注射自身血液后经管型石膏伸直位固定7周制备兔膝关节外伤性僵硬模型。
METHODS: Totally 24 rabbits were prepared for traumatic stiff knee models by injecting one's own blood into right knee joint and immobilized the knee in extension position with plaster for 7 weeks.
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