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 BS EN 12284-2003 Refrigerating systems and heat pumps-Valves-Requirements, testing and marking.pdf [db:摘要]
阀门标准 BS EN 12266-2-2002 Industrial valves. Testing of valves. Tests, test procedures and acceptance criteria. Supplementary requirements.pdf [db:摘要]
