<strike id="gegfc"><dl id="gegfc"></dl></strike>
<sub id="gegfc"></sub>

    <mark id="gegfc"></mark>

      First major tunnel over 5,000 meters drilled through along China-Laos railway

      Source: Xinhua| 2019-03-21 12:51:40|Editor: xuxin
      Video PlayerClose

      LAOS-BOTEN-CHINA-RAILWAY-TUNNEL

      Constructors and local Lao residents attend the drilling-through ceremony of Boten Tunnel along the China-Laos railway in Boten of Laos, March 21, 2019. A Chinese railway engineering company on Thursday drilled through Boten Tunnel, the first major tunnel over 5,000 meters along the China-Laos railway. This marks an important milestone in the construction of the project. The Boten Tunnel, with a length of 6453.5 meters, is among the 10 major tunnels longer than five km along the China-Laos Railway. The tunnel has to pass through unfavorable geology such as karst, bedding rock, fault fracture zone, gypsum, carbon mudstone, and water inrush, and it varies, thus creating lots of difficulties to the Chinese engineering company, China Railway No. 5 Engineering Group (CREC-5). (Xinhua/Wang Jingqiang)

         Prev 1 2 3  

      KEY WORDS:
      EXPLORE XINHUANET
      010020070750000000000000011100001379124501
      中文字幕日韩无线码在线一区_制服肉丝亚洲中文字幕_日韩欧美无砖专区一中文字目_国产精品点击进入在线影院高清
      <strike id="gegfc"><dl id="gegfc"></dl></strike>
      <sub id="gegfc"></sub>
      
      
        <mark id="gegfc"></mark>
          综合色婷婷在线播放 | 色七七在线免费观看视频 | 亚洲综合不卡在线视频 | 中文字幕一区二区三区日韩精品视频 | 亚洲欧美日韩在线综合专区 | 午夜精品一区二区三区免费视频 |