The double radius hole type was commonly adopted for the forming machine of straight weld pipe with vertical roller in domestic present.
目前，国内带有立辊组的直缝焊管成型机大都采用双半径孔型。
Straight generatrix shape roller and arc generatrix shape roller are incompletely the same in processing.
形母线与圆弧形母线滚子，在采用无心贯穿磨削时，并不完全相同。
The processed cruving and straight edge can be trimmed by the square roller from the top and bottom at the same time with fine, Evenness and precision.
用仿形滚轮可上下同时对所加工的曲直线进行修边，可均匀准确修整。
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