The apical initial cells of the root top were arranged in cone shape and no typical histogen zones were found.
根的顶端原始细胞为圆锥状排列的原始细胞群，未见典型的组织原分区。
Result: Images based on cone beam CT can clearly display the spatial relationship between root and maxillary sinus as well as inferior alveolar nerve canal.
结果：锥型线束CT可清楚显示牙根与下牙槽神经管及上颌窦之间的解剖关系。
Circular cone gear design include: geometry calculation accuracy contacts intensity tooth root bending intensity accuracy, plus the value of the test items and business computing.
圆锥齿轮的设计包括：几何尺寸的计算，校核接触强度，齿根弯曲强度校核，齿轮各检验项目及公差值的计算。
According to Darcy-theory and Dupuit-hypothesis, the roots of tree were approximately considered as an upside-down circular cone, and then plant root water uptake model was established.
该文根据达西定律和裘布衣假定，把树木根系近似看作为倒圆锥体，建立了树木根系吸水模型，并以油松为例对模型进行了验证。
According to Darcy-theory and Dupuit-hypothesis, the roots of tree were approximately considered as an upside-down circular cone, and then plant root water uptake model was established.
该文根据达西定律和裘布衣假定，把树木根系近似看作为倒圆锥体，建立了树木根系吸水模型，并以油松为例对模型进行了验证。
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