埋弧自动焊在钢管拱拱肋环焊缝中的应用
宇文德成,张丽惠
Application of Automatic Submerged - arc Welding in Girth Welding of Arch Rib of Tube Arch
YUWEN De - cheng,ZHANG Li - hui
铁道工程学报 . 2011, (7): 73 -77 .