As a large, multi-functional modern precision instrument, coordinatemeasuring machine (CMM) has more and more shown its great importance and wide development prospect in industry.
三坐标测量机为一现代大型与多功能的精密量侧仪器，已越来越显示出它的重要性和宽广的发展前景。
2
The three coordinatemeasuring machines, as a kind of measuring instrument, become an indispensable part and are more and more applied to manufacture, electron, automobile and spaceflight, etc.
By measuring the coordinate positions of a series of fixed targets from several instrument locations and calculating the measurement results, the working uncertainty of the total system will be given.