作用－角度－角度－角度变换
action-angle-angle transformation
水平角度测量
horizontal angle measurement
本底活度水平
background activity level
层拉平水平切片
horizontal slice of level flattening
城市节水水平
the level of city water-saving
城市节水水平综合评价
Comprehensive Assessment of Urban Water Saving Level
带垂度水平拉索－节段桥面系统
system of horizontal cable with sag and bridge dec
低角水平生长型
Low angle and horizonal growth pattern
高水平视觉表征
higher level visual representation
供水水平
amount of water - applied
irrigation rate