FIELD: metal working; gas-laser cutting. SUBSTANCE: method comes to delivery of processing gas under pressure into cutting torch body coaxially with laser beam and delivery of water to cutting zone at flow rate of 0.01-4.0 ml. mm of cut. Device has cutting torch body with condenser lens, processing gas feed hole and injector type orifice nozzle. Device has additional reservoir to feed water to zone of cutting. EFFECT: increased thickness of cut materials without increasing power consumption, improved quality of cut by reducing zone of heat influence. 3 cl, 2 dwg, 1 tbl
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