保持水土
preserving waterand soil
preserving water and soil
soil and water conservation
water and soil conservation
北回归线水土保持观察站
soil and water conservation station on Tropic of C
北京林业大学水土保持系
beijing forest university
北京林业大学水土保持学院
beijing forestry university
college of Soil and Water Conservation
不服水土
authentication of digital photo
not accustomed to the climate of a new place
蔡川水土保持示范区
Caichuan soil and water conservation demonstration
长江水利委员会长江水土保持局
Yanglze burenu of soil and unter
Yangtze vally planning of fice
承压水土层
soil with confined aquifer
城市水土保持
soil and water conservation in urban area
urban soil and water conservation
cities’ soil and water conservation
Urban Water and Soil Conservation
soil and water conservation in city
城市水土流失
city soil and water loss
urban soil and water loss
urban water and soil loss
soil and water losses in city
地基土水平基床系数
horizontal coefficient of subgrade reaction