田径场不分道项目起跑线渐伸线画法

The Way to Draw the Starting Line and Involute for Inseparate Track Events

不分道项目起跑线画法,多年来所用方法都是不确切而又繁琐的。本文介绍了它的正确画法,并指出其理论根据。

It is always inaccurate and complicated to draw the starting line for inseparate track events in the traditional way. This article introduces the correct way f drawing the line and states its theoretical basis.