An ultra-precision grinder having 1nm detecting and positioning resolution on XYZ axes was usedin the test. X and Z axes on horizontal plane were driven by liner motors, and Y axis is settled on atable of X axis and controlled with a ball screw. Two air-spindles are employed as a tool spindle and aw的翻译：什么意思？中文翻译英文，英文翻译中文，怎么说？

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1nm的检测和定位分辨率XYZ轴超精密磨床usedin测试。水平面的X和Z轴由班轮电机驱动，Y轴是X轴atable落户，并与滚珠丝杆控制。受聘为工具主轴和awork主轴的两个空气主轴。