曲面的法线 meaning in English

normal to a surface
normal to the surface

Characteristic of normal line of compact connected surfaces
紧致连通曲面的法线特征
To machine the honeycomb sandwich , an interpolation method based on a rotary axis is also studied . with the round vector function and rotary movement group , a model of the error curved surface of the theoretical ellipsoid is set up to describe the actually measured surface
以圆矢量函数和回转运动群为工具讨论了曲面的误差变换，利用理论椭球面的误差曲面建立了实测曲面的数学模型，通过求解理论曲面的法线实现了实测曲面的等距计算和阴阳面数据转换。