Invention Grant
US09537183B2 Automatic water control system for open ditch drainage 有权
开沟排水自动控水系统

Automatic water control system for open ditch drainage
Abstract:
An automatic water control system for open ditch drainage includes a drainage control apparatus that is designed to be disposed in a drainage ditch and to control the water level in the drainage ditch, as well as the water table level in the field.
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