During pipe line laying or large beam support welding, it often meets crossover of two or multi different axis large diameter pipe piece.
在管道铺设或大型梁架焊接过程中，往往会遇到两个或多个不同轴线的大直径管件相交的情况。
During pipe line laying or large beam support welding, it often meets crossover of two or multi different axis large diameter pipe piece.
在管道铺设或大型梁架焊接过程中，往往会遇到两个或多个不同轴线的大直径管件相交的情况。
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