径矢

在此理论研究的基础上，建立奥利康制摆线齿锥齿轮齿面几何参数如径矢、法矢等的统一计算模型，分析了其求解方法，并根据该模型进行齿面接触分析研究。

In this fundamental research foundation , it establishes Oerlikon system cycloidal tooth bevel gear tooth face geometric parameter like diameter arrow , french arrow and so on unification computation model , has analyzed its solution method , and conducts the tooth face contact analytical study according to this model .

髓腔最狭窄的部位在肱骨中下1/3左右，其冠状径、矢状径在7～8mm左右。

The most narrow part of the intramedullary cavity was located in the under 1 / 3 of humerus , and its diameter was from 7 to 8 mm in the sagittal and coronal plane .

髓腔略呈椭圆形，其横径与矢状径相差约1mm，取其平均值，髓腔直径4.1mm。颈椎不同位置时矢状径及截面积的解剖观察

The average diameter of the medullary cavity was 4.1 mm while the sagittal diameter was 1.0 mm less than the transverse one . Anatomic observation of sagittal diameter and cross section area of cervical intravertebral canal at different positions

方法：用游标卡尺和自制弧度仪测量129例颈椎各椎体最小高度、冠状径、矢状径和前壁横向弧度；

Methods : Minimal height , coronal and sagittal diameters of cervical vertebral bodies were measured on 129 dry Chinese adult cervical vertebrae .

剑鞘形状的程度用内冠状径与内矢状径的比率（气管指数）来表示。

The distorted degree or saber sheath shaping was expressed by the ratio of the internal coronal diameter to the sagittal diameter ( trachea index ) .

而第5、第6气管环的内横径，内矢状径是基本相等的，分别为17.1mm和14.2mm。

However , the internal transverse and sagittal diameter of the sixth trachea was equal to that of fifth , 17.1 mm and 14.2 mm separately .

胸椎椎弓根的横径、椎弓根-肋骨头结合体横径、椎弓根矢状径测量结果：椎弓根横径为3.27～7.94mm，T4左侧最小，凹侧椎弓根横径小于凸侧；

The measuring result of transverse diameter of thoracic pedicle , transverse diameter of pedicle-rib unit and sagittal diameter of pedicle : transverse diameter of thoracic pedicle was 3.27-7.94 mm and that of T4 left side was the smallest .