国标图集中渐缩异径弯头的绘制问题

The drawing problem of reducing elbow in national standard atlas

在编制《钢制管配件自动绘制软件》的过程中,发现标准图集《钢制管件》(02S403)中渐缩异径弯头的图纸存在问题。在查找相关资料的时候,发现该问题普遍存在,特提出该问题供探讨。

In the process of compiling the automatic drawing software for steel pipe fittings,the author found that there was a problem with the drawing of the reducing elbow in the standard atlas Steel Pipe Fittings(02 S403).When searching for relevant information,I found that the problem is widespread,This issue is specially raised for discussion.