big arc radius的用法和样例：
- The relation between the maximum radial error and arc radius and approach step-length in the secant mode of arc data interpolation in CNC system is detailed.
- Like big arc, cent segment angle, continuous change angle's etc. all ability pass plait distance to realization.
- The jet fluctuation was mainly caused by the big arc distributaries and the engulfment.
- Although curves of big arc lines are higher in rate of hit its level of difficulty in techniques is higher and it is not easy to command in a short time.
- tool top arc radius compensation