bitumen concrete faced rockfill dam
Concrete Faced Rockfill Dam
concrete faced rockfill dam CFRD
CONCRETE-FACED ROCKFILL DAM
High Concrete Faced Rockfill Dam
high concrete faced rockfill dam CFRD
Shuibuya Concrete Faced Rockfill Dam
Zipingpu Concrete Faced Rockfill Dam
assorted sand and gravel
clay-core gravel sand dam
full-face sand and gravel stratum
gravel and sand mulched field
great deep sand and gravel aquifer
rural land sand and gravel