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A low-lying place that it is easily become a claypan,such as a sleek cement floor, a Polyurethane-made court and so on.
If you use a traditional windshield wiper to clear up the water, it is often happened that the water go back to low-based area. We called a backflow. We add a space that can collect the water in a that windshield wiper, and we can effectively increase the function
of clearing up the water.
Chiayi County, Taiwan
Shun Cheng, Yang