船用法兰铸铁闸阀A型、AS型

CB/T466-1995船用法兰铸钢闸阀 Marine Cast Steel Flanged Gate Valves
CB/T467-1995船用法兰青铜闸阀 Marine Bronze Flanged Gate Valves
CB/T3955-2004法兰不锈钢闸阀 Flanged S.S Gate Valves