一、使用效果使用这种划线仪可以直接划出管道工程中任意角度的等径、异径的两管相交或多面体与圆管的任意角度相交的相贯线。我们经过多次现场试验,完成一个主管孔划线用3～5分钟,完成一个支管马鞍用5～10分钟。使用该划线仪可以免去划展开图做样板的繁琐工序,节约大量的金属材料,提高效率(40至50倍)和划线精度。二、工作原理 First, the use of effect The use of such a line marking instrument can be directly drawn at any angle of the pipe project of equal-diameter, different diameter of the intersection of two or polyhedron intersects the pipe at any angle intersecting the line. After several field tests, we completed a charge hole with 3 to 5 minutes to complete a branch saddle with 5 to 10 minutes. Use of this line scriber eliminates the cumbersome process of creating a drawing plan, saving a large amount of metal material, increasing efficiency (40 to 50 times), and scribing accuracy. Second, the working principle