The Statistical analysis of piston ring tracer cutting errors shows that there is a systematic error in the tracer cutting.

对活塞环仿形车削误差的统计分析表明：靠模仿形加工中存在系统误差。

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And give out the unified optical path, Newton's ring radius and convex lens curvature radius measurement formula of non - contact type, simple cutting type and tangent type Newton's Rring.

并给出了非接触式、浅近切割式及相切式牛顿环的统一的光程差，牛顿环半径及凸透镜曲率半径测量公式。

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This paper introduces a new method cutting the profile of tooth of large gear ring, which has no upper limit diameter.

介绍了一种大型齿圈齿形加工的新方法，并对其加工原理、主要参数的选择计算和切削试验结果进行了分析。

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Little Ann's 40-year-old single "Deep Shadows, " produced by Detroit's Dave Hamilton, is a marvel of subtle understatement, built around little more than a bass line, a slight tinkle of piano, a cutting guitar line and, most notably, those bells, which ring loud and portend nothing auspicious.

NPR: Little Ann: 40 Years Later, An Unlikely Resurrection