阀门标准 BS EN 12351-1999 工业阀门 带法兰连接的阀门保护帽Industrial valves. Protective caps for valves with flanged connections .pdf [db:摘要]
阀门标准 JIS B2005-3-3-2005 Industrial-process control valves-Part 3-3：Dimensions-End-to-end dimensions for buttweld, two-way, globe-type, straight pattern control valves.pdf [db:摘要]
