Ключевые слова: boxes, business, cardboard box, cargo, commerce, commercial, daytime, delivery, depot, distribution, export, factory, falling, freight, goods, gravity, import, indoors, industrial, industry, interior, inventory, kinetic energy, logistics, manufacturing, merchandise, motion, moving, no people, order, packaging, physics, potential energy, product, retail, shipment, shipping, sliding, sliding down, stability, stack, storage, storehouse, supply chain, tilting, trade, transportation, warehouse, wholesale,