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медицина
проба с форсированной жизненной ёмкостью лёгких
[fes]
существительное
география
г. Фес
Iron(II) sulfide or ferrous sulfide (Br.E. sulphide) is one of a family chemical compounds and minerals with the approximate formula FeS. Iron sulfides are often iron-deficient non-stoichiometric. All are black, water-insoluble solids.