permanent echo permanent elongation permanent error permanent expansion permanent extension permanent form permanent foundation permanent gas permanent joint permanent lag permanent load permanent magnet permanent-magnet ammeter permanent-magnet galvanometer permanent-magnet instrument permanent magnetism permanent-magnet loudspeaker permanent-magnet machine permanent-magnet meter permanent-magnet metre |
permanent echo отразен сигнал от неподвижни предмети Търсената дума е намерена |