Как сделать трубу из оцинковки ver2

As of galvanized sheet iron to make pipe from galvanized. This is the second version. Here we focus on the practice. In the first version of the larger theory of how to calculate the size of a sheet of the desired diameter of the pipe, as the correct sizes, taking into account errors in the bends, etc. The first version of the video "How to make a pipe of galvanized" can be viewed at the link:    • Как сделать трубу из оцинковки Ver 1