Ключевые слова: 3d, background, belt, big, blue, coal, color, colorful, conveyor, cyan, digging, dirty, drawing, energy, equipment, extraction, factory, fossil, fuel, geology, gray, heap, helmet, huge, illustration, industrial, industry, large, load, machine, machinery, mine, mineral, minerals, mining, natural, ore, picture, pile, power, render, rendering, rock, stack, stockpile, technology, transport, transportation, work,