Main : Filter Papers : Qualitative Analytical Filters : MN 619; dense, slow filtration, smooth, for fine and extremely fine precipitates 0.17mm thick, 100s filtration speed, weight 75g per meter square
Filter Papers : Qualitative Analytical Filters : MN 619; dense, slow filtration, smooth, for fine and extremely fine precipitates 0.17mm thick, 100s filtration speed, weight 75g per meter square
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