This paper analyzes the offcenter error of installing reference ball as testing lathe main spindle rotation errors in Ningxia Institute of Technology and puts forward the way of eliminating errors.
本文对宁夏工学院测试车床主轴回转误差运动时基准球安装偏心引起的误差进行了分析，并提出了剔除该误差的方法。
This paper discusses how to reasonably and effectively use multimedia technology, what should be learned from and be paid attention to in Ningxia Institute of Science.
宁夏理工学院如何合理有效使用多媒体教学应该吸取的经验和注意的一些问题。
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