目的：探讨下颈椎屈伸运动对其应力分布的影响。
Objective To Study the stress distribution of the lower cervical spine in the flexion and extension movement.
如上述研究所示，指骨骨软骨瘤最常见的伴随症状是冠状面的畸形和指间关节屈伸运动受限。
As shown in previous studies, the most frequent symptoms associated with phalangeal osteochondromas are coronal plane deformities and limitation of interphalangeal joint flexion and extension.
它的关键部件是控制人工腿膝关节屈伸运动及小腿摆动的智能控制器，其常常采用模糊控制策略。
Its crucial part is intelligent controller, which controls bend and stretch of the knee joint of artificial leg as well as shank swing and often adopts fuzzy control strategy.
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