A great many intersecting lines exist among steel tube truss structure but the traditional manual-lofting cut can no longer fulfill the requirement for precision and mass production.
钢管桁架结构中存在大量的钢管相贯连接节点，传统的人工放样切割已经不能满足精度和工厂化生产的要求。
Compared with the traditional lofting methods, the marking scriber has the advantages of high efficiency, convenient operation, accurate intersecting lines, and regular intersecting lines.
使用本划规与传统的放样方法相比，效率高，操作简便，且画出的相贯线准确、规整。
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