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

采用近似场论的方法，获得了一种分析任意槽形螺旋槽结构的普遍理论。

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

螺旋槽成形铣削时普遍存在根切现象，在很大程度上影响到加工精度和几何形状。

3·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.

如在简单的机器上的区段所指出的，一个螺丝钉以一个楔住行动行事而且有圆形圆筒(或者切断了圆锥体)与一螺旋状的在它里面的凹槽。

4·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.

介绍了一种实用的内侧槽抽芯机构，可利用螺旋形弹簧钢板的顶出变形实现内侧抽芯，并阐述了抽芯机构的工作过程和关键技术。

5·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.

该方程适用于滚子为柱型或锥型凸轮为槽定位或脊定位、单头或多头、左旋或右旋、上转或下转的情况。