noncarbon ink

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Noncarbon ink — Неуглеродистая краска … Краткий толковый словарь по полиграфии
heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… … Universalium

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