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推导了表孔弧形闸门液压启闭机启门力的计算公式，建立了启闭机的优化布置模型．从最大启门力—行程曲线出发，对优化布置模型进行了求解．
The calculation formula of the door opening force of hydraulic hoist in surface gate arc gate is deduced, and the optimal layout model of hoist is established. Starting from the maximum force-stroke curve, the optimal layout model is solved.