Whatman 滤膜 6781-1304 Puradisc 13针头式滤器, 0.45m聚砜 500/盒

Whatman 滤膜 6781-1304 Puradisc 13针头式滤器, 0.45m聚砜 500/盒 PURADISC 13/0.45 PES 500/PK