A relationship of vertex , edge and facet of a triangulation network was discussed , and a three - dimensional model was given . and several methods of rapid prototyping manufacturing are also compared and analyzed , in order to get a proper way in engineering real application 在分析stl格式文件的基礎(chǔ)上,本文給出了三角網(wǎng)格中頂點(diǎn)v棱邊e三角片f的關(guān)系三維模型,提出了它們之間的關(guān)系式r ( v , e , f ) 。