怎么翻译这段话？

云淡

The machine tools employ a Sinumerik 840D (Siemens AG) numerical-control system, with NURBS (nonstandard-spline) functions, which permits interpolation of a contour of any form with high accuracy, since it is reproduced by the numerical-control program directly from the CAD/CAM system. The preliminarily specified profiles are smoothed here, and uninterrupted motion over the trajectories is possible; this considerably improves the surface of the part. The computerized numerical-control system ensures the speed, stability, and precision of machine-tool operation in both positioning and tracking modes.

cg600

本机床采用Sinumerik 840D (Siemens AG)数控系统，包含NURBS (非标准样？？) 功能-----直接由CAD/CAM软件数字化控制，使任何形状的高精度interpolation（插值？）成为可能。  初始数据（概况？文件？）在这里被处理（平滑？），使连续的轨迹成为可能，这样大大的提升了工件的表面质量。数控系统保证了机床的定位和跟踪模式的速度，可靠性和精度。  

以上仅供参考

cjstgm

回复2楼：
非标准花键

cg600

谢谢三楼，不过不知道花键是什么东东

qinsdau

The machine tools employ a Sinumerik 840D (Siemens AG) numerical-control system, with NURBS (nonstandard-spline) functions, which permits interpolation of a contour of any form with high accuracy, since it is reproduced by the numerical-control program directly from the CAD/CAM system. The preliminarily specified profiles are smoothed here, and uninterrupted motion over the trajectories is possible; this considerably improves the surface of the part. The computerized numerical-control system ensures the speed, stability, and precision of machine-tool operation in both positioning and tracking modes.
二楼翻译的挺好，不过有几个地方不太准确，下边是我的疑问，不好的地方请多多指教。
本机床采用带有加工非标轮廓（NURBS）功能的siemens AG数控系统，由于再加工是由CAD/CAM系统直接驱动数控系统，实现了插入任何高精轮廓的加工。实现了按预定轨道连续运动的同时不影响原加工轮廓平滑度，从而提高了零件的表面质量。由此数控系统使得机床定位和跟踪操作模式的速度、稳定性及精度都得到了保证。