Whatman 滤膜 6799-2504 Puradisc 25针头式滤器, 0.45m Nylon 500/盒

Whatman 滤膜 6799-2504 Puradisc 25针头式滤器, 0.45m Nylon 500/盒 PURADISC 25/0.45 NYL 500/PK