康宁corning耗材3421TW,6.5MM,5.0UM,TCT,PC,S,12PL/48TW,6.5MM,5.0UM,TCTPC,S,12PL/48 Transwell-24膜嵌套 6.5mm直径 5.0um孔径PC膜 TC表面 PC（聚碳酸酯）灭菌4包/箱