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KGW® Complete Cold Trap Kit with Dewar Flask, Glass Cold Trap and Plastic Ring for Fixing of the Cold Trap동결트랩세트, 드와 플라스크 포함, Spherical Joint/Screw Connect-type KGW® Complete Cold Trap Kit with Dewar Flask, Glass Cold Trap and Plastic Ring for Fixing of the Cold Trap동결트랩세트, 드와 플라스크 포함, Spherical Joint/Screw Connect-type