https://www.tradekey.com/product_view/Polymer-Concrete-Drainage-Channel-1365978.html
Manufactured from polymer concrete, YIN XING RainDrain standard channel assembly consists of a 1m polymer concrete channel and galvanised steel grating. This...
polymer concretedrainage channelshijiazhuangyinxingsand
https://www.usgs.gov/publications/ancient-drainage-basin-tharsis-region-mars-potential-source-outflow-channel-systems
Paleotopographic reconstructions based on a synthesis of published geologic information and high-resolution topography, including topographic profiles, reveal...
drainage basintharsis regionancientmarspotential