导读：标准号 StandardNo:GB/T 20490-2006中文标准名称StandardTitle in Chinese:承压无缝和焊接(埋弧焊除外)钢管分层的超声检测英文标准名称:Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes - Ultrasonic testing for
标准号 StandardNo:GB/T 20490-2006
中文标准名称StandardTitle in Chinese:承压无缝和焊接(埋弧焊除外)钢管分层的超声检测
英文标准名称:Seamless and welded (except submerged arc-welded) steel tubes for pressure purposes - Ultrasonic testing for the detection of laminar imperfections
