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 1868-1975(R1990) Steel check valves(flanged and butt-welding ends) for the petroleum,petrochemical and allied industries.pdf [db:摘要]
