VDI/DGQ3441 Statistical Testing of the Operational and Positional Accuracy of Machine Tools[S]. Translation of the German ISSURE,3/1997.是什么意思_VDI/DGQ3441 Statistical Testing of the Operational and Positional Accuracy of Machine Tools[S]. Translation of the German ISSURE,3/1997.在线翻译_英语_读音_用法_例句