垂直基准仪
attitude reference system
垂直基准转换
vertical datum transformation
transformation about vertical datum
大直径基桩
large-diameter foundation pile
基准基床系数
Reference Coefficients of Subgrade Reaction
相邻不同大地垂直基准
Different vertical datum in different neighboring nations
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
（浮动基准面）
both spiritual and formal resemblance iconicity