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1440-917 - Grade 40 Ashless Filter Paper for Pollution Analysis, 460 × 570 mm Sheet - Whatman Quantitative Filter Papers, Ashless Grades (ash 0.007%), Grade 40, GE Healthcare - Pack of 100: Amazon.com: Industrial & Scientific
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Papel Filtro Nº40 24cm - Whatman Ref. 1440-240 Cx. 100 Un. - Filter Pa - Dajota Produtos para Laboratório
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