Whatman 滤膜 6750-2502 Puradisc 25针头式滤器, 0.2m Nylon 50/盒

Whatman 滤膜 6750-2502 Puradisc 25针头式滤器, 0.2m Nylon 50/盒 PURADISC 25/0.2 NYL 50/PK