目的分析外固定针结构与其拧入骨干时引起远侧皮质骨折间的关系。

Objective To analyze the relationship between the structure of external fixation pin and the fracture of distal cortex.

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目的：探讨螺旋形导针配合双侧斜位X线片判断颈椎椎弓根螺钉置入孔道准确性的可行性。

Objective: To evaluate the accuracy of cervical pedicle screw pilot holes placement by bilateral oblique X-ray films with the spiral wires as the guide pin.

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用于针织系统的系统部件(1)，由具有针踵(18)的主体(3)组成，针踵从主体(3)的窄侧(16)向外突出。

A system component (1) for a knitting system is composed of a body (3) with butt (18), which projects outward from the narrow side (16) of the body (3).

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