本文继作者[1]中对平面曲线的法向等距线所进行的讨论,又引进了空间曲线的法向等距线和平面曲线的向心等距线并研究了它们对机械工程的某些应用。 This paper follows the discussion of the normal equidistant line of the plane curve by the author [1], introduces the isometric equidistant lines of the normal isometric line and the plane curve of the space curve, and studies their influence on the mechanical engineering Some applications.