目的建立人工髋关节置换术后的三维有限元模型，分析研究人工股骨柄、骨水泥和人体股骨的应力分布。
Objective a three dimensional finite element model after total hip replacement was established to analytically study the stress distribution of the artificial stem, bone cement and human femur.
宋，元时期出现了圆镜，长方镜，菱镜，八棱镜和带柄手镜等。
During the Song and Yuan Dynasties the bronze mirrors appeared in all shapes: round, rectangular, rhomboidal, octagonal, and those with a handle.
改造后的脱丙酮系统脱柄酮效率提高，己烷损失减少，每年节省成本40多万元，并延长了设备的寿命。
As the loss in hexane is reduced the cost can be cut down mom than400thousand RMB yuan annually and the service life of facilities can be prolonged.
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