摘要
论述并证明了累加弦长三次参数样条曲线上多余拐点的产生、判别和避免等问题，并为样条曲线的应用及进一步研究作了理论上的准备。
The emergence, distinction and aversion of the superfluous inflexion of trispline curve are expounded and proved. This provides theoretical preparation for application and further research of the spline curve.
