大直径直缝焊管
Large－ sized straight weld pips
large-diameter butt welded pipe
large diameter longitudinal welded pipe
Large-sized straight welded tube
木材气体径向渗透性
Radial gas permeability of wood
表面最大直径
The greatest surface diameter
插入式大直径钢圆筒
sink-in large diameter steel cylinders
插入式大直径圆柱壳结构
thin-walled embedded large-diameter cylindrical shell structure