Expert professionals carefully construct tunnels for metro latest route. Stability for safe metro travel ensured by strength of reinforced concrete

Expert professionals carefully construct tunnels for metro latest route. Stability for safe metro travel ensured by strength of reinforced concrete
  • 素材ID:1442814788
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  • 格式:MOV
  • 时长:00:07
  • 作者:OKIOKI
  • 最大分辨率:3840 x 2160px
关键词
安全城市道路职业路径城市车站地下轨道机械发展方式铁轨工业工程维护保养团队合作基础设施黑暗工作场所男人地铁铁路现场行业结构头盔劳动者交通运输铁路施工技术隧道混凝土导管建筑电气