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2. ??????? ??????????? ?? ????? ???? ??? 400?? ???? 100?? 4???? ????. ????? ??? ???? ????, ??? ??? ????? ??? ????.(2) ???? ? ???????(Whatman 2?), ??, ??? ?? ???? TP(top paper), 2? ??? ???? BP(between paper), ??? ???? ???? PP(pleated paper) ??? ?? 0.8mm?? ??? 0.5mm? ?? ?? ??? ???? 15mm? ?? ? ?? ?
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