The pronunciation of “呲电焊” is “make electric welding spark”. In this phrase, “呲” can be understood as making a spark or sputtering sound. “电焊” is “electric welding”. When welding, there is often a sparking phenomenon. This is a description of the action and process of electric welding. It's important to note that this is a rather colloquial expression and not a formal technical term in English. ????
