Whatman 滤膜 7184-005 NC 硝酸纤维素, 白色平滑,0.45m 50mm 100/盒

Whatman 滤膜 7184-005 NC 硝酸纤维素, 白色平滑,0.45m 50mm 100/盒 WCN WH 50MM 0.45uM 100/PK