阀门标准 JIS B2005-2-1-2005 Industrial-process control valves-Part 2-1：Flow capacity-Sizing equations for fluid flow under installed conditions.pdf [db:摘要]
阀门标准 BS EN 13959-2004 Anti-pollution check valves – —N 6 to —N 250 inclusive Family E, type A, B, C, and —.pdf [db:摘要]
