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Background Chordomas of the upper cervical spine are rare and present unique surgical challenge.This study aimed to desc......
Type Synthesis and Characteristic Analysis of a Family of 2-DOF Rotational Decoupled Parallel Mechan
It is widely used for the rotational parallel mechanism in the field of spatial orientation. While owing to the existenc......
以湖北省《荆楚辉煌30年》主题地图集的编制为例,简要介绍了为纪念湖北省改革开放30周年服务的专题地图集的制作意义及表示内容,探......
