Ключевые слова: abstract, background, black, blue, build, building, business, car, cloud, cloudy, concept, construction, contour, crane, design, detailed, digger, during, engineering, equipment, error, excavator, freight, hook, industry, lift, light, lorry, machine, machinery, maintenance, preparation, ray, shovel, silhouette, site, sketch, sky, solid, structure, sun, sunrise, sunset, support, technology, tower, truck, under, white, work,