Which type of mining requires that a large diameter drill to extract coal from seems?
auger
<...
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History, 26.02.2022 03:30, nataliemoore1974
Which type of mining requires that a large diameter drill to extract coal from seems?
auger
room and pillar
surface
mountaintop removal
![answer](/tpl/images/cats/otvet.png)
Answers: 1
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