污泥资源化
sewage sludge recycling
usefulness of sludge
sludge reclamation
Sludge Reclamation and Reuse
国土资源沙盘模型
Sand-tray model of land and resources
流域水沙资源
water and sediment resources within river basin
水沙资源
the water and sand resources
Water and Sediment Resources
水沙资源化
utilization of flood water and sediment
水沙资源利用
utilization of water and sediment resources
分布式能源资源
distributed energy resource
国有森林资源资产
national forest resource asset
煤炭资源资产分类
coal resource assets classification