Ключевые слова: aggregate, backhoe, bobcat, building materials, companies, company, concrete industries, construction, construction industry, distribution, dump truck, dust, dynamite, economy, employment, excavation, explosives, filler, gravel, industrial modernization, industrial process, industrial vehicles, industry, labor, latin america, location, logistics, machinery, materials bank, materials distribution point, mexico, movement, natural resources, pebble, processing, processing industry, quarries, quarry, refinery, rock crusher, rocks, sand, scree, specialized industry, stone, storage, third world infrastructure, tractors, trailer, transformation, transport, transport trucks, transportation, underwater equipment, workers, working conditions, yucatan,