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Study on construction technology of percussive reverse circ..:

Zeng, Jun-Yan ; Li, Hai-Qin ; Guan, Wei-Dong.
IOP Conference Series: Earth and Environmental Science.  787 (2021)  1 - p. 012144 , 2021
Link: https://doi.org/10.1088/1755-1315/787/1/012144