What are the advantages of surface mining of coal compared to underground mining?
Igualmente, se destina a cubrir los gastos que deba asumir el Observatorio en concepto de daños y perjuicios, en particular los derivados de reclamaciones contra el mismo (responsabilidad civilLiterature Literature
Surveying, measuring, signalling, life-saving instruments (electrical), including those being explosion-proof, for underground and surface mine operation