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"国产精品视频永久免费播放" Qinling-Zhongnanshan Highway Tunnel
Source:CRECDate:2018年11月28日

 Started in 2002 and opened to traffic in 2007, Qinling-Zhongnanshan Highway Tunnel is the world's longest double-hole highway tunnel with a total length of 18 国产精品国产三级国产普通话. 4 kilometers. CREC independently built about 49% of the tunnel.

Qinling-Zhongnanshan Highway Tunnel

 

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