Ключевые слова: black, buried, burying, business, civil engineering, clay, construction, construction site, diminishing perspective, dirt, dirty, ditch, energy, engineering, environment, environmental, ground, heating, hole, industrial, industry, infrastructure, isolation, land, line, lining, long, metal, modern, new, object, personal perspective, perspective, pipe, pipeline, plastic, polymer, power, process, progress, project, protective, row, soil, straight, symmetry, technology, trench, tube, underground,