Ключевые слова: analysis, boring, car, construction, dig, dirt, dirtied, dirty, drill, drilling, earth, ecological, ecology, engineering, environment, equipment, excavation, exploration, geologic, geologist, geology, grass, ground, industrial, industry, job, machine, metal, mineral, mining, pump, research, rig, rock, sample, sampling, site, soil, strong, summer, survey, technical, technology, test, testing, tool, tube, vehicle, work, worker,