标准水平比较
comparison of the standard 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
大比尺水工模型试验
large scale hydropower project model test
调水比例
ratio of downstream versus natural annual inflows
工业水平尺
Industrial horizontal ruler
供水水平
amount of water - applied
irrigation rate