清理河道淤泥
Clean up river silt
WATCH This Modern Technology Remove MILLIONS of Plastics From The Ocean
https://www.youtube.com/watch?v=FdZXRZ3-zZs
Waterbug Aquatic Havester | 60 second video | Cleaning Algae & Weeds in Lake
https://www.youtube.com/watch?v=45HIq26_AqU
0:00 / 1:30
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https://lakeweedharvester.com/eco-har…
WATCH ECO-HARVESTER DEMO VIDEOS at: https://lakeweedharvester.com/eco-har…
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Eco-Harvester 2020 Drone Video Skimming Algae & Pulling Aquatic Weeds
https://www.youtube.com/watch?v=mKqkBHvufDI
Restoring Aquatic Ecosystems
https://www.youtube.com/watch?v=gahNy2_1yvE
改变黄土高原，有多难？
Transforming The Loess Plateu, How Difficult Is It?