大直径径向渗透率仪
full diameter radial permeameter
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
变口径加权
Weighting with variable length
垂直加热分布函数
Vertical heating distribution function
垂直加速度
vertical acceleration
colducting
acceleration in vertical vibration