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| 2021, Vol. 58(6): 251-256 DOI: | ||
| Study on Preparation of Synchronous Grouting Material from Excavated Red Sandstone in Shield Tunnelling | ||
| (1 Xining Rail Transit Co., Ltd., Xining 810001; 2. Lanzhou Rail Transit Co., Ltd., Lanzhou 730070) | ||
| Received null Revised null | ||
| Supporting info | ||
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