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關注：1
2013-05-23 12:21
求翻譯：a controlled spillway has a mechanical method to regulated the water flow over or through a dam. this can be a door or series of door, valves, or other methods of diverting or preventing the overflow of water.是什么意思？ 待解決
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a controlled spillway has a mechanical method to regulated the water flow over or through a dam. this can be a door or series of door, valves, or other methods of diverting or preventing the overflow of water.
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