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| 2021, Vol. 58(2): 111-117 DOI: | ||
| Analysis on Pre-grouting Reinforcement Effect of Pipe Roofs for the Shallowburied Mined Tunnel in Soft Rocks | ||
| (1 Inner Mongolia Vocational and Technical College of Communications, Chifeng 024000; 2 College of Highway, Chang′an University,Xi′an 710064) | ||
| Received null Revised null | ||
| Supporting info | ||
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