helictite heliocentric heliocentric coordinates heliocentric-type reducer heliograph heliographic latitude heliographic paper heliography helion heliophysics helioscope heliotrope helium helium age helium bubble chamber helium-cooled parametric amplifier helium-neon laser helix helix accelerator helix angle |
helictite геол. сталактит с усукана форма Търсената дума е намерена |