<p class="MsoPlainText"> <span>Study and Practice on Negative Ring Launching Technique </span>for DoubleShield TBM Used in Qingdao Metro

GUO Zhi, TANG Xigang, HAN Lisen, TIAN Bin, DING Shaojun, LU Xiaofeng

Tunnel Construction . 2021, (S1): 425 - . DOI: 10.3973/j.issn.2096-4498.2021.S1.056