好看的中文字幕av,巨尻av在线,亚洲网视频,逼特视频,伊人久久综合一区二区,可以直接观看的av网站,天堂中文资源在线观看

Installation and Completion of a Double-way Five-stage Ship Lock in the Three Gorges Project (China)

Updated: 2014-04-01

In the Three Gorges Project, CGGC was responsible for installing all the metal structures and electromechanical equipment used for the permanent ship lock, which is of the largest scale, the most complex technology and the biggest difficulty in the world.

Installation and Completion of a Double-way Five-stage Ship Lock in the Three Gorges Project