By the study to the principle of kinematics, a specialproperty for the curve line on curved surface is found, that is thecurve line is with a characteristic traverse guage on it.

• 通过对加工运动学原理的研究,找出曲面上的曲线也存在着活动的特征标架这一特性,提出了模仿特征标架沿曲面曲线运动的特征加工法。