阀门标准 BS 7461-1991 Specification for electrically operated automatic gas shut-off valves fitted with throughput adjusters, proof of closure switches.pdf [db:摘要]
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 BS 5351-1986 Specification for steel ball valves for the petroleum, petrochemical and allied industries.pdf [db:摘要]
