Design code and key technical points for main tunnel and parallel heading of East Qinling Super-long Tunnel are introduced.
介绍东秦岭特长隧道工程正洞及平行导坑的设计标准、施工技术要点。
Design code and key technical points for main tunnel and parallel heading of East Qinling Super-long Tunnel are introduced.
介绍东秦岭特长隧道工程正洞及平行导坑的设计标准、施工技术要点。
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