FIELD: devices for spraying chemical compounds in lawns and gardens. SUBSTANCE: sprayer is designed for mixing first fluid with second one before spraying. Sprayer includes spraying head joined with bottle of cartridge; hood covering joint of spraying head with bottle of cartridge. Chemical compounds are remained in closed system even after securing bottle of cartridge to spraying head. Novelty is unique system formed by means of toothed members and/or cam for opening duct for second fluid flow and for providing reliable operation mode. Diameter of duct opening for flow of second fluid is set beforehand. Such structure provides sustaining of system filled with chemical compound in closed state even after mounting cartridge in sprayer. EFFECT: enhanced reliability and safety of sprayer. 15 cl, 7 dwg
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