The mechanical structure and working principles of a kind of rolling tool for spiral groove tubes are introduced, and the geometrical parameters of normal spiral groove tubes are provided.

介绍了一种螺旋槽换热管轧制工具的机械结构及工作原理，给出了常用螺旋槽换热管的几何参数。

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The effects of fabric orientation, stitch structure, loop shape and geometrical parameters on the tensile and flexural properties are analyzed.

分析了增强织物的取向、组织结构、线圈形态、几何与结构参数等因素对拉伸与弯曲性能的影响。

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Under the foundation of sufficient utilization of the present design and structure, the plan of improvement design of the geometrical parameters of gears is presented.

在充分利用现行设计和结构的基础上提出改进齿轮几何参数设计的方案。

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