polythionic acid polytope polytropic change polytropic curve polytropic expansion polytropic exponent polytropic process polyurethane polyvalent polyvalent cation polyvalent notation polyvariant system polyvinyl polyvinylalcohol polyvinylchloride polyvinylidene pommel pomped-storage plant pomping shaft pomp shaft |
polythionic acid хим. политионова киселина Търсената дума е намерена |