阀门标准 BS EN 1567-2000 Building valves. Water pressure reducing valves and combination water reducing valves. Requirements and tests.pdf [db:摘要]
阀门标准 JIS B2005-6-1-2004 Industrial-process control valves. Part 6：Mounting details for attachment of positioners to control valves Section 1：Positioner mounting on linear actuators.pdf [db:摘要]
