In order to achieve Class-A surface quality for primary and secondary surfaces, the surfaces must have G3 Curvature conditions in relation to each other.
在为了达到A级表面质量的小学和中学的表面，表面必须具有的G3曲率条件，在相互关系。
2
The effects of curvature and torsion on secondary flow, isoline of stream function and distribution of the axial velocity of flow were discussed.
The analytical results show that the influence of the variation of belt tension is most obvious, and that of the slotting angle and run-up angle are secondary on the curvature radius.