Ключевые слова: art, banner, benchmark, brush, business, construction, crude, derrick, drawing, drilling, earth, economic, energy, engineering, exploration, flag, freehand, fuel, gasoline, germany, graffiti, grunge, icon, industry, isolated, line, mine, mineral, national, oil, paint, paintbrush, petrol, petroleum, plant, power, production, pump, refinery, resource, rig, silhouette, sketch, splash, state, stroke, symbol, technology, vintage, watercolor,