|
||||||||
|
|
| 2020, Vol. 57(2): 80-85 DOI: | ||
| Six-stage Ventilation Techniques for the Large and Long Gas Tunnel with Trackless Transportation and Advance Construction of Parallel Adit | ||
| (1 China Railway 16th Bureau Group Co., Ltd, Beijing 100018; 2 College of Pipeline and Civil Engineering, China University of Petroleum, Qingdao 266580) | ||
| Received null Revised null | ||
| Supporting info | ||
|
