For the even weld of crossover pipe pieces with reliable welding, the project requires to cut the weld position of crossover pipe pieces into shape exactly.
工程上，为了管件的相交处焊缝均匀，焊接可靠，需要将相交管件的焊缝处准确切割成型。
In engineering, in order to make the weld line even and reliable, it is needed to cut the weld opening accurately.
工程上，为了使钢管相贯处焊缝均匀，焊接可靠，需要将钢管的焊口准确切割成型。
For normal map generating purposes you don't even have to attach and weld the different sub components together, as long as they fit seamlessly you should be fine.
考虑到生成法线贴图的目的，你甚至无需将几个构成组件合并焊接起来，就像它们本身是无缝的一样。
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