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Deep Drilling Equipment and Technology of Complex Lead-Zinc Ore: a Case Study of a Lead-Zinc Ore Drilling Project in Cangyuan，Yunnan Province
DUAN Zhiduo
Journal of Kunming Metallurgy College . 2020, (3): 14 -19 .  DOI: 10.3969/j.issn.1009-0479.2020.03.003