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Glass Packing Ring, for Column Packing, “Rasching Rings”, Φ9mm×L 9mm<br>For Contamination-free, Boro-glass 3.3, Package : in 500cc Bottle, 칼럼충진용 글라스링 Glass Packing Ring, for Column Packing, “Rasching Rings”, Φ9mm×L 9mm<br>For Contamination-free, Boro-glass 3.3, Package : in 500cc Bottle, 칼럼충진용 글라스링