kontaktkeevituse protsess/operatsioon, kus põkkliide saadakse detailide otspindade kuumutamisega sulasse olekusse koos järgneva detailide kokkusurumisega, a resistance welding process that produces coalescence at the faying surfaces of abutting members by a flashing action and by application of pressure after heating is substantially completed; the weld is completed by a rapid upsetting of the workpieces