Ключевые слова: 155mm, armed, armor, armored, army, artillery, barrel, battle, big, caliber, camouflage, cannon, conflict, cu chi, cu chi tunnel, cu chi tunnels, defense, drawing, energy, equipment, exhibition, force, green, gun, heavy, historical, history, isolated, metal, military, object, old, outdoors, plant, power, red, road, shot, soldier, soviet, steel, technology, tunnels, vietnam, vietnamese, war, weapon, white, world,