91精品视频免费播放,天天射天天操天天干中文字幕,久久亚洲精品视频,国产流白浆,免费黄色按摩视频,久久青草91线频免费观看,日韩高清无码色色

banner
Guiweng Qingshui River Bridge
2017-12-23 09:11:17

Qingshui River Bridge is located in the expressway from Guiyang of Guizhou province to Weng’an with a total length of 2171.4m. The main bridge is suspension bridge of single span simply supported steel truss stiffening girder with 1130m main span. The main bridge is over 500 meters high from the deepest canyon,and it is a suspension bridge whose span is the biggest and the most difficult in construction among similar bridges in Guizhou.


貴甕清水河大橋.jpg