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划线工划相贯线时,通常先在硬纸板上划上相贯线展开图,然后再描到圆柱体上进行下料,比较麻烦也不精确。我设计的划规可直接在圆柱体上划
When planning a line of intersection, it is common practice to first draw the line of intersection on the cardboard and then plot it on a cylinder for unloading, which is troublesome and inaccurate. I design rules can be drawn directly on the cylinder