Accueil > Term: main levels
main levels
The first and leading excavations in mines that are made for the purpose of opening out or winning the material being mined, and that are intended to be the principal roadways of the mine.
- Partie du discours : noun
- Secteur d’activité/Domaine : Mines
- Catégorie : Exploitation minière; Mineral mining
- Government Agency: USBM
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Créateur
- ed.young
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(V.I.P) 21084 points - 100% positive feedback
(Milwaukee, United States)
