Practice on the repair to the erosion area at the entrance section of the emergency gate slot at No.2 Opening of the sluiceway of Liujiaxia Hydropower Station是什么意思_Practice on the repair to the erosion area at the entrance section of the emergency gate slot at No.2 Opening of the sluiceway of Liujiaxia Hydropower Station在线翻译_英语_读音_用法_例句