| 摘要 |
In a system including, for example, an irrigation line supported by towers and rotatable about a central pivot, one tower thereof, for example, the outermost tower, includes a governor system for providing that increased water flow is provided to the water motor driving that tower as that tower is driven up a grade, and decreased water flow is provided to the water motor driving that tower as that tower is driven down a grade, as compared to the water flow to such water motor as the tower is driven over generally level ground.
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