在颈椎侧位片上测量椎体前缘序列弧线的弧弦距。
The distance of arc between vertebral anterior edge sequences was measured on lateral films of cervical vertebra.
弦的垂直平分线经过圆心，并且平分弦所对的两条弧。
A perpendicular bisector of a chord passes through the centre and bisects the arc.
空间圆弧粗插补用弦进给代替弧进给，即用空间直线代替圆弧。
The arch feed was replaced with bowstring feed in spatial arch interpolate, or circular arc was replaced with spatial straight line.
本文将计算井眼实际轨迹的空间圆弧法分为弦步法与弧步法。
In this paper the space circular are method for calculating the real trace of well bore is devided into chord and are methods.
用矢量代数方法导出了弦步法与弧步法两组公式并作了例算对比。
The two sets of formulas for chord and are methods are derived by using vector algebraic method and some examples are listed for calculating and contrasting.
中国云南头骨颧骨弧长、弦长、颧骨高及颧骨曲度小于华北头骨。
The height of the zygomatic bone of modern Europeans in smaller than that of Huabei skulls, but is similar as Yunnan's.
在轨迹处理中，提出基于弦长和弧长关系的伪轨迹处理方法，得到合理的运动轨迹。
A pseudo-trajectory processing method based on the relationship between chord lengths and arc lengths is proposed to obtain reasonable trajectories.
这些数字化设备多数采用等弦或等弧方式采集物体表面的数据。
The adopted equipments are Coordinate Measuring Machine, NC with measuring device, special digitizer etc.
这些数字化设备多数采用等弦或等弧方式采集物体表面的数据。
The adopted equipments are Coordinate Measuring Machine, NC with measuring device, special digitizer etc.
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