FIELD: production of apparatuses to form surface layers of covering type; apparatuses are used in metallurgy and mechanical engineering industries to cover lengthened pieces; bar, angle bar, channel, shaped pieces etc. SUBSTANCE: supersonic nozzle 1 is made as collector 6 linked with nozzle acceleration section 7. Collector 5 and nozzle acceleration section 7 are made in the form of helicoid with pitch, that does not allow interaction of opposing to each other two-phase streams flowing out of supersonic part of nozzle. System of two-phase mixture feeding has inlet branch pipe 2 mounted on collector 6 butt tangentially to its generatrix. EFFECT: improved design. 2 dwg
