Cite
MLA Citation
Rongjun Sun et al.. “Simulation study of new directional drilling PDC bit used in coal mine.” Geosystem engineering, vol. 20, no. 3, 2017, pp. 142–148. http://access.bl.uk/ark:/81055/vdc_100045334839.0x000020
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Rongjun Sun et al.. “Simulation study of new directional drilling PDC bit used in coal mine.” Geosystem engineering, vol. 20, no. 3, 2017, pp. 142–148. http://access.bl.uk/ark:/81055/vdc_100045334839.0x000020