bevel-seated valve

Related Study of the Morphology of the Proximal Femur and the Biologic Fixation of Tapered Femoral Component;

股骨近端形态与锥形柄全髋生物学固定的相关研究

In order to solve the problem of the craze during dawing and several time dawing,design method of multilayer taper die,its structure and parameter are discussed in this paper.

为了解决拉深时开裂及多次拉深的问题,探讨了锥形多层拉深模的设计方法。

Methods Some partial orders on normal orthogroup are constructed by the cones.

方法从正规纯整群的锥形出发构造amenable序。