The book describes the technology of manual arc welding, outlines the basics of semi-automatic arc welding in protective gases, gas welding, oxygen, oxygen-flux, air-arc and plasma-arc cutting of metals. Provides basic information on modern welding equipment, production control methods, labor organization, safety and welding standards. The book is intended as a textbook on special technology when training electric welders in vocational schools with a two-year term of study. It can be used for training and advanced training of welding workers in courses, schools, technical circles and for independent study of welding.