The mathematical formulas for roundness measurement has been descussed firstly based on the tri-probe error separation technique.
详细推导出三测头误差分离原理用于测量工件圆度误差的数学公式；
The error separation technique of the sphericity is derived from that of the roundness, and analyzed in theoretically, due to the lack of the on-site measurement of the sphericity.
针对球度误差没有实现在位测量的问题，将圆度误差分离技术引伸到球度误差分离技术，并在理论上进行了探讨。
The error separation technique of the sphericity is derived from that of the roundness, and analyzed in theoretically, due to the lack of the on-site measurement of the sphericity.
针对球度误差没有实现在位测量的问题，将圆度误差分离技术引伸到球度误差分离技术，并在理论上进行了探讨。
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