筒体上板边圆形人孔的展开计算

Unfolding calculation of Crimping Round Manhole on Shell

介绍筒体上设计有板边圆形人孔时，板边圆形人孔的展开计算公式、计算过程，并通过计算实例介绍了具体的展开计算过程及需要注意的问题．

In order to design the crimping round manhole on shell, this paper gives the unfolding calculation formulae and procedure, and discusses with practice in detail.