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• A theory for the analysis of the arbitrarily-shaped helical groove structure is obtained by means of an approximate field-theory.

采用近似场论方法，获得了一种分析任意螺旋结构普遍理论

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• Usually, there exist undercutting phenomena in helical groove milling process, which affect the accuracy and geometrical shape greatly.

螺旋成形铣削普遍存在根切现象很大程度上影响到加工精度几何形状

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• As indicated in the section on simple machines, a screw ACTS with a wedging action and consists of a circular cylinder (or truncated cone) with a helical groove in it.

简单机器区段所指出的，螺丝钉一个行动行事而且圆形圆筒(或者切断了圆锥体)螺旋状的在它里面的凹槽

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• A practical mechanism for the core-pulling of inside groove was presented. The core-pulling was achieved by applying the deformation of helical spring steel sheet during the ejecting process.

介绍一种实用内侧机构，可利用螺旋形弹簧钢板变形实现内侧抽芯，并阐述了抽芯机构的工作过程和关键技术。

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• The equations is used whether roller is column or cone, cam is in spine or groove location, left or right helical, single head or many heads and how it is turning.

方程适用滚子柱型凸轮定位定位、或多头、旋或右旋、上或下转的情况。

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• The equations is used whether roller is column or cone, cam is in spine or groove location, left or right helical, single head or many heads and how it is turning.

方程适用滚子柱型凸轮定位定位、或多头、旋或右旋、上或下转的情况。

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