metallide, harvemini teiste materjalide (klaasi, plastmasside) liitmine automaat-molekulaartõmbe- (nakke-) jõudude vahendusel
joining pieces of suitable metals or plastics, usually by raising the temperature at the joint so that the pieces may be united by fusing or by forging or under pressure. The welding temperature may be attained by external heating, by passing an electric current through the joint or by friction.
joining pieces of suitable metals by striking an electric arc between an electrode or filler metal rod and the pieces
