Materials and Methods:20 patients with 25 un-erupted and impacted teeth were scanned by Spiral CT and processed by dental reconstruction with SIEMENS spiral CT scanner.
材料和方法：用Siemens螺旋CT扫描机，对20例共25颗上颌埋伏阻生前牙患者进行螺旋CT横断面扫描，并进行曲面、三维重建。
The teeth on bevel gears can be straight, spiral or hypoid.
锥齿轮的齿可以是直齿、螺旋形或准双曲面。
Objective: To discuss the Clinical application of spiral ct scanning and 3d imaging reconstruction in the localization of unerupted maxillary teeth.
前言：目的：探讨螺旋CT三维重建技术在埋伏牙定位中的应用价值。
Objective: To evaluate the diagnostic value of spiral CT 3D reconstructions for ambushed accessory teeth in maxillo-facial region.
目的：探讨螺旋CT三维重建技术对颌骨埋伏多生牙的诊断价值。
The gear cutting machines with single tilt mechanism, such as the TAN-A9 machine, are intended only for cutting the spiral bevel and hypoid gears with teeth of constant depth.
诸如TAN-A9这样的单刀倾切齿机床过去仅用于加工等高齿弧齿锥齿轮和准双曲线齿轮。
A high speed line material vertical rolling mill framework moderating machine gearbox of Hunan steel Co. , Ltd, the gear teeth of the first transmission spiral bevel wheel were broken.
詹仁杭，轧立式轧机减速机螺旋伞齿轮断齿原因分析湘钢一高速线材粗中轧立式机架减速机齿轮箱，第一级传动螺旋伞齿轮轮齿断裂。
A high speed line material vertical rolling mill framework moderating machine gearbox of Hunan steel Co. , Ltd, the gear teeth of the first transmission spiral bevel wheel were broken.
詹仁杭，轧立式轧机减速机螺旋伞齿轮断齿原因分析湘钢一高速线材粗中轧立式机架减速机齿轮箱，第一级传动螺旋伞齿轮轮齿断裂。
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