石膏矾土膨胀水泥
gypsum aluminate expansive cement
黄河水利委员会天水水土保持科学试验站
Tianshui Soil and Water Conservation Station of Yellow River Committee
傍河型地下水水源地
riverside groundwater resource field
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