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DIN 38409-23:1980-05

Отменен
German standard methods for the examination of water, waste water and sludge; general measures of effects and substances (group H), determination of methylen blue active and bismut active substances (H23) — 13 стр.
ICS
13.060.50 Examination of water for chemical substances / Исследование воды для определения содержания химических веществ