blunt start
螺钉钝头(blunt start), 此释义来源于网络辞典。
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目的设计一种新型椎弓根钝头钻，以期减少椎弓根螺钉植入的穿破率。
Objective to design a blunt-tipped drill of pedicle screw placement, in order to decrease the accident of pedicle violations during pedicle screw placement.
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