This result can be combined with subdivision method to obtain a piecewise interval polynomial approximation for a rationalsurface.
这一结果可以与细分技术相结合，得到有理曲面的分片区间多项式的逼近。
2
This article analyzes the main factors and selection of rational cutting conditions influencing the surface flatness error and other defects in sawing marble plates with diamond saw blade.
本文分析了金刚石框锯在锯切大理石时，引起表面平面度偏差和其它缺陷的主要因素以及合理工作条件的选择。
3
Ungula and ring fracture are due to higher surface hardness. The rational suggestions to settle fracture are put forward.