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cylindrical arch dam
hydroel.st. 圆筒形拱坝; 圆筒式拱坝
tech. 圆柱拱坝; 圆筒拱坝
cylindric arch dam
hydroel.st. 圆筒形拱坝; 圆筒式拱坝
tech. 圆柱拱坝; 圆筒拱坝

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