Ключевые слова: air, amass, area, arranging, backgrounds, barrel, black, canal, circle, close up, company, construction, curve, cylinder, deep, design, dock, drilling, duct, element, equipment, factory, ferrous, field, finished products, front, gas, gasoline, goods, gray, group, heap, horizontal, industrial, industry, iron, kit, line, loading, manufacturing, merchandise, metal, objects, oil, order, pattern, pipe, pipeline, production, profile,