标 准 编 号：BS 1414-1975 简体中文标题：石油、石化及相关工业用（法兰端和对焊端）钢制楔式闸阀繁体中文标题：石油、石化及相关工业用（法兰端和对焊端）钢制楔式闸阀English Name：Specification for steel wedge gate valves (flanged and butt-welding ends) for the petroleum, petrochemical and allied industries ...