黑人中文字幕一区二区三区,日韩av片无码一区二区不卡电影,日韩毛片毛片久久精品,久久3,日本高清视频一区二区三区四区,四虎新网址,成人影院91sp42

banner
Gansu Zheda Liujia Gorge Bridge
2017-12-23 10:06:20


Liujia Gorge Bridge is a longest single span bridge in Gansu so far, longest suspension bridge in southwest China, the most narrow bridge among the same scale bridges in China too. It adopts a steel pipe concrete gate type tower with 536m main span and 15m deck.


甘肅折達劉家峽大橋.jpg