common axis

In order to calculate the intensity of general-stress in tri-axis test in geotechnical investigation, the author uses cartesian geometry principle to derivate calculation functions of common tangent points coordinates of every circle by the common tangent line. Especially, the slope tangent line is calculated directly.

工程勘察三轴试验的总应力强度指标的计算，运用解析几何原理导出任意两个应力圆公切线切点坐标计算公式，尤其是直接计算切线斜率。

Finding the common tangent of two circular cone curves with the communal axis of symmetry

求具有公共对称轴线的二圆锥曲线的公切线

Horizontal-axis turbines are the most common wind turbine design.

水平轴涡轮机是最常用的风力涡轮发电机.

Five axis CNC machining centers have become quite common today.

目前五轴CNC机床已经得到广泛的应用.

Disc pack: A grouping of two or more rigid magnetic recording discs on a common axis.

磁碟组: 同轴组合的两个或以上的硬磁碟.