龙滩水电站尾水检修闸门抓梁与门叶配合调整及梁格封堵
룡탄수전참미수검수갑문조량여문협배합조정급량격봉도
Match Adjustment and Beam-grid Blockage of Grasp Beam and Gate Leaf of Draft-tube Check Gate for Longtan Hydropower Station
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