... 导孔道 feed track 导孔间距 feed pitch 导纳算子 admittance operator ...
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导势孔道 passage heat-transfer
先导控制管道孔 pilot control line port
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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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