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| 2023, Vol. 60(4): 86-94 DOI: | ||
| Study on Action Mechanism of Double-layer Support for the Parallel Adit of Tunnels in Extremely-squeezed Surrounding Rocks | ||
| (China Railway 19th Bureau Group Rail Transit Engineering Co., Ltd., Beijing 101300) | ||
| Received null Revised null | ||
| Supporting info | ||
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