YB/T 4674-2018
焊接异型钢管
2018-10-22
YB/T 171-2014
复杂断面异型钢管
Special shaped steel tubes
2014-05-06
GB/T 3094-2012
冷拔异型钢管
Cold drawn shaped steel tubes
2012-05-11
WJ 2697-2008
火箭炮用定向螺旋异型钢管规范
Specification for launching tube of shape steel with spiral for rocket launcher
2008-03-17
SN/T 4367.8-2015
进出口钢管检验规程 第8部分：异型钢管
2015-12-04