FIELD: automatics and computing technique, namely automated control systems and also registering units of computing systems. SUBSTANCE: apparatus has a second spraying chamber, being formed upon mounting of an electric dropping fluidic head in a body of a tank with a working liquid. An output nozzle, secured to the housing of the tank, is arranged coaxially with a capillary. A cross section of a duct of the second spraying chamber changes from a rectangular one to trapezoidal one, widening to a side of its opened end. EFFECT: enhanced reliability at operation of the apparatus. 1 cl, 1 dwg
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