In the welding engineering of large-scale pipe structures, the assembly precision and the branch pipe cuttingcurve of two intersecting pipes haven't been settled for a long time.
在大型管结构的焊接工程中，相交双管的装配精度及支管下料高度一直未得到很好的解决。
2
A closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it.
由完全相交的一个圆锥体和一个平面的交集所形成的闭合的平面曲线。
3
Method of identification of the two is to look at the pattern of the wood texture, veneer wood chipping straight and dense, veneer rotary cutting and thinning pattern curve.