The disquisition pilot study about the computer assisted optimization design of a screw spring of many radices using math layout theory conjoint to computer programmer method with a exemplity.

笔者将数学规划理论与计算机程序设计方法相结合，通过实例对多股螺旋弹簧的计算机辅助优化设计进行了初步探讨。

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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.

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。

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Methods: The pedicle screw pilot holes were drilled within the center of the pedicle, violated pedicle walls in 9 human dried thoracic vertebrae.

目的：建立判定胸椎椎弓根螺钉植入孔道是否准确的新方法。

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Here is an important thing to consider: when airlines cancel due to their own fault, such as a mechanical mishap or pilot scheduling screw up, they are liable for expenses their delayed passengers incur.

FORBES: Making Bad Travel Worse: Did Airlines Cancel Early For Hurricane Sandy?