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 12266-1-2003 Industrial valves. Testing of valves. Pressure tests, test procedures and acceptance criteria. Mandatory requirements.pdf [db:摘要]
