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本刊七卷六期至十二期连载有颜龙先生所写的“变位齿轮及其在机床制造定上的应用”、“变位齿轮原理与计算”、及“变位系数的选择问题”等三篇文章。这三篇文章所提出的变位圆柱齿轮问题里,有渐伸線可分离性、啮合角、啮合方程、变位齿轮尺寸、最小变位系数、各种啮合质量指标的验算、尺寸检验、变位齿轮在机床上的应用、以及变位系数的选择等等,正如原作者颜先生听说的,在“有关变位齿轮的中文资料,目前尚不多”的情况下,无疑地对读者是有帮助的。笔者认为这些文章里的某些问题尚值得商榷,
This issue of seven volumes from 6 to 12 serialized with Mr. Yan Long wrote “variable gear and its application in the manufacture of machine tools,” “variable gear principle and calculation,” and “variable coefficient of choice ”And other three articles. In these three articles, there are involute spur separability, meshing angle, meshing equation, displacement gear size, minimum displacement coefficient, checking of various meshing quality indexes, dimensional inspection, variable Bit gear on the machine tool application, as well as the choice of coefficient of variation, etc., as the original author, Mr. Yan heard that “in the case of the Chinese information on the displacement gear, is not yet much,” undoubtedly readers are helpful. I think some of these issues in the article is still debatable,