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Instrument and meter
Circular filter paper, MN 1640 d, Quantitative, slow speed (140 s), smooth
Circular filter paper, MN 1640 we, Quantitative, very fast (5 seconds), smooth
Circular filter paper, MN 1640 md, Quantitative, medium to slow speed (55 seconds), smooth
Circular filter paper, MN 1640 w, Quantitative, fast (9 seconds), smooth
Circular filter paper, MN 1640 de, Quantitative, very slow (195 seconds), smooth
Circular filter paper, MN 1640 m, Quantitative, medium speed (27 seconds), smooth
Successful operation!