Petroleum and natural gas industries - Compact flanged connections with IX seal ring (ISO 27509:2012 + Cor. 1:2013); English version EN ISO 27509:2012 + AC:2013, only on CD-ROM
石油和天然气工业.带IX密封圈的紧凑型法兰连接件(ISO 27509-2012+Cor.1-2013);英语版EN ISO 27509:2012+AC:2013 仅CD-ROM