The periosteum near linea aspera should not be stripped during operation on super medial femur fracture to avoid damage on superior nutrient artery.
股骨中、上段骨折手术时，应避免剥离近粗线的骨膜，以免损伤上滋养动脉。
The design method of gravity network on the basis of the principle of the linea - programming and the sequential optimization is given.
本文提出了根据线性规划和连续优化的原理设计重力网的方法。
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