阀门标准 BS EN 12569-1999 工业阀门.化学和岩石化学工艺工业阀门.要求和试验Industrial valves – Valves for chemical and petrochemical process industry – Requirements and tests.pdf [db:摘要]
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]
