Learning article title 3

Nuevas técnicas de extracción de minerales
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Tunneling drill jumbo machines

Jumbo is the name given to an electro-hydraulic equipment equipped with one or several hydraulic hammers (drills) on hydraulic arms that allow access to any part of the face. It is a machine designed to carry out underground work quickly and automatically: advancement of tunnels and galleries, cross drilling, benching with horizontal holes and mining by cut and fill, among others.