jelenako57605
jelenako57605
02-05-2017
Biology
contestada
How is coal removed from the ground?
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Аноним
Аноним
02-05-2017
Machines are used to remove coal from the ground, there are two ways, one of them implies surface mining, where they dig the dirt, then filter it to find coal, the second way implies underground mining, where workers go deep down, to find coal.
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fitbit
fitbit
02-05-2017
Coal miners use giant machines to remove coal from the ground. They use two methods: surface or underground mining.
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