阀门标准 BS EN 13942-2009 Petroleum and Natural Gas Industries – Pipeline Transportation Systems – Pipeline V.pdf [db:摘要]
阀门标准 JIS B2005-3-2-2005 Industrial-process control valves-Part 3-2：Dimensions-Face-to-face dimensions for rotary control valves except butterfly valves.pdf [db:摘要]
