FIELD: rendering of effect on man's respiratory system. SUBSTANCE: device has series-connected compressor, pressure stabilizer, gas separating membrane module and flow-rate setting device. If device is faulty check instrument included in flow-rate setting device indicates deviation of flow rate or/and concentration of oxygen from preset value. Device does not require use of gas analyzer. EFFECT: enhanced reliability, reduced cost price. 3 cl, 3 dwg
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