1、
Back hyperextension: Lying on stomach, extend the body, let arms and legs fully stretch out.
山羊挺身(上图): 俯卧, 伸展身体, 双腿和双臂向四周充分伸展.
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2、
Operative Treatment of a Rare Knee Hyperextension type of arthrogryposis multiplex congenita
罕见膝反屈型先天性多发性关节挛缩症的手术治疗
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