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
供水水平
amount of water - applied
irrigation rate
农田灌溉节水水平
the level of water-saving agricultural irrigation
水平平行顶管
level parallel pipe-jacking