本文详细考察了与中等口径管道焊接相比需要新解决方案的各道工艺步骤。焊工与规划人员可从中了解一系列新解决方案，我们此前已……
The article provides a detailed consideration of the process steps necessitating new solutions in comparison to the welding of pipes of medium diameters. Welders and planners can learn about a range of new solutions with which we have already...