puits (1) recherche (1) plomb (1) équipement (1) investigation (1) dommage (1) réduction des coûts (1) activité minière (1) méthode (1) capteur (1) public (1) Costs (1) Area (1) Death (1) Methods (1) Specialists (1) Area (1) Employees (1) Research (1) Weight loss (1) Radius (Anatomy) (1) Must (1) Mining engineering (1) Mines and mineral resources (1) Mineral industries (1) Metropolitan areas (1) Mathematical optimization (1) Lightning (1) Lead (1) Intuition (1)