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On the colliery's area this machine was waiting
for being transported underground. It is used in the roadways underground.
Because of the pressure caused by the surrounding rocks, sometimes the
roadways's floor moves up. After a certain time there will be a lack of space in
the roadways because of this. This machine - we can only see a part of it here -
is used to remove the material that has been pushed up and by that it restores the
roadways' former diameter.
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