以下为句子列表：
英文: Abstract: This paper puts out the edge shapes curvilinear equations,of the edge shapes of double circular gear hob, and analyzes the tooth surface's characterist.It also points out that the gear hob is a kind of approximate shape building cutting too ls i
中文: 文摘:本文提出了直槽双圆弧齿轮滚刀刃形曲线方程式，并进一步分析了该滚刀的齿面特性，指出该滚刀从整个使用过程看，是一种近似造型的刀具。
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英文: Abstract: This paper takes the manufacturing of non-circular gear as an example to analyze the non-circular gear's tip curve error influence upon it′s contact ratio which is manufactured by involute cylindrical shape cutter, and it provides a theory basis
中文: 文摘:以非圆齿轮插齿加工为例，分析了利用渐开线圆柱插齿刀加工非圆齿轮时齿顶曲线误差对非圆齿轮重合度的影响，为严格控制非圆齿轮副的重合度提供了理论保证。
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