What do you mean by a gear and a welder?

Create a file. One welder corresponds to one file, which means that each device must create one file. A directory must be established for each file to be used for similar devices. Electric welding machine refers to an electrical appliance that provides a certain power supply for welding. Welding is widely used in various industrial fields because of its flexibility, simplicity, convenience, firmness and reliability, and even the strength after welding is the same as that of the base metal.