2·Except that the selected sliding surface is formed by logarithmic helicoidal surface-logarithmic helicoidal surface-plane, no other simplifications or assumptions are made.
除选定滑动面为对数螺旋面—对数螺旋面—平面的形式外，没有其他任何的简化或假定。
3·The common conjugate surface includes tooth surface of gear, working surface of solid CAM, helicoidal surfaces existing in spiral burr, worm, chip flute of cutters, and so on.
常见的共轭曲面包括齿轮的齿面、空间凸轮的工作面和螺旋面等，其中螺旋面被广泛应用于螺纹、蜗杆、螺杆泵及金属切削刀具等领域。