<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>
          亚洲成a人a∨久在线观看 | 久久久特色aⅴ片免费观看 午夜在线亚洲免费 | 亚洲欧美中文字幕在线一区91 | 亚洲有码在线观看 | 偷窥精品在线视频 | 日韩精品双飞一区二区三区 |