如图所示是一个水位高度控制装置的示意图当水位到达高h时水恰好顶起塞子a从出水孔流出水位下降后塞子a又把出水孔堵住塞子a底部是半径为r Template




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tomski如图所示是一个水位高度控制装置的示意图当水位到达高h时水恰好顶起塞子a从出水孔流出水位下降后塞子a又把出水孔堵住塞子a底部是半径为r coloring