A string of transport belting in a gravel pit for transporting gravel and sand over long distances, belts go along the lake.lake, water, belting, gravel pit, conveyor, machinery, sand, mine, belt, large, industry, pit, gravel, industrial, technology, quarry, mineral, transportation, equipment, long, machine, factory, geology, rock, stone, crusher, transport, soil, outcrop, dig, crushing, ground, plant, steel, dust, crushed, open-pit, pebble, loading, minerals, rubble, mining, raw materials, conveyors