ISSN 2096-4498

   CN 44-1745/U

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Proposal on Installing Access Ramp to Facilitate Tunneling with Vertical Shafts
YONG Yi, LI Jun, LI Kai
Tunnel Construction . 2012, (3): 393 -397 .  DOI: 10.3973/j.issn.1672-741X.2012.03.024