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crossball

10/15/20 2:23 PM

#28159 RE: Faltotyq #28153

Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels. Aug. 6 2019

TRUE THAT
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Masala

10/15/20 2:56 PM

#28162 RE: Faltotyq #28153

It's deduced from ameca reports on the easy accessibility of the veins of graphite