tungsten filament tungsten halogen lamp tungsten inert-gas welding tungsten point file tungsten sensitivity tungsten steel tungstic tungstite tuning tuning board tuning capacitance tuning capacitor tuning coil tuning curve tuning dial tuning element tuning eye tuning-fork clock tuning-fork oscillator tuning frequency |
tungsten filament волфрамова нишка Търсената дума е намерена |