Hello everyone! I worked as an apprentice in an aluminum alloy stainless steel door and window shop for 4 days. I am learning argon arc welding, that is, manual arc welding of thin square pipes and round pipes. I also studied for more than three months. It is not difficult to weld that thing flat, but it is difficult to weld it at 90 degrees. After studying for three months, I was not allowed to do it. I practice by myself. The main thing is that you have to look at the capillary with your eyes, and then the capillary must be welded on the welding wire. It's a hole if it's not welded to it. Remember this, one day I will learn flat welding, not for a month.