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.
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.
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).
叶对生，长圆状戟形至三角状披针形，长2-3.5厘米，宽0.5-1.5厘米，顶端锐尖，基部近心形或截平；侧脉每边约5条；叶柄长约1厘米。
Leaves opposite, oblong-hastate to triangular-lanceolate, 2-3.5 cm long and0.5-1.5 cm wide, apex acute, base subcordate or truncate; petioles1 cm.
为便于与滚针轴承的滚针和保持架组件或外圈组件结合，内圈在滚道两侧有引入槽。
To facilitate their combination with needle roller and cage assemblies or the outer ring assembly of needle roller bearings, they have a lead-in at each side of the raceway.
为便于与滚针轴承的滚针和保持架组件或外圈组件结合，内圈在滚道两侧有引入槽。
To facilitate their combination with needle roller and cage assemblies or the outer ring assembly of needle roller bearings, they have a lead-in at each side of the raceway.
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