1 .3 . Определение массовой доли хрома в стали углеродистой про­ водят в двух параллельных навесках. В тех лее условиях,что и пробы до 0,5/^ ) и измерении интенсивности окраски полуденного соединения , окрашенного в краснофиолетовый цвет. 556 ны).


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