A jumbo is a rig used to drill an underground tunnel. The video shows a real world example of a Jumbo drilling in an underground mine. For those who are familiar with the Jumbo, is this the correct sequence of drilling a tunnel?
Video by Jory Dion.
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A jumbo is a rig used to drill an underground tunnel. The video shows a real world example of a Jumbo drilling in an underground mine. For those who are familiar with the Jumbo, is this the correct sequence of drilling a tunnel?
Video by Jory Dion.