单词 | mining production |
释义 | mining production Domestic mining production supplies an important quantity of some nonmetals: silica sand, pyrophyllite clay, dolomite, and limestone. Retrieved from Wikipedia CC BY-SA 3.0 Actual mining production began in 2011. Retrieved from Wikipedia CC BY-SA 3.0 Mining production from 1866 through 1869 was intensethe rich deposits encouraged quick exploitation, and the shift to hydraulic mining kept production in high gear. Retrieved from Wikipedia CC BY-SA 3.0 |
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