<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

      Lao girls pose for pictures at 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 Next  

      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>
          日韩一级在线视频一区 | 伊人久久综在合线视频 | 日韩国产精品区一99 | 亚洲成年看片在线观看 | 午夜福利片国产精品 | 亚洲欧美偷拍综合图区一区 |