Ключевые слова: cast, coal, digger, earth, earthmoving, energy, engineering, environment, environmental, equipment, excavation, fossil, fuel, geological, geology, ground, heavy, industrial, industry, layer, load, loading, machinery, machines, mechanical, mine, minerals, miners, mining, moving, natural, new zealand, nonrenewable, nz, open, opencast, outdoors, outside, pit, power, resources, seam, south island, stockton, strata, stratum, trucks, west coast, westland, worker, working,