effervescent bubbles effervescing efficency-testing machine efficiency efficiency curve efficiency diode efficiency of control efficiency of rectification efficiency of subgrade soil efficiency plan efficiency ratio efficiency test efficient statistic efficient working effloresce efflorescence efflorescent effluence effluent effluent control |
effervescent bubbles обог. чупливи мехурчета във флотационната пяна Търсената дума е намерена |