Ключевые слова: acetylene, air, background, balloon, blue, bottle, chemical, color, compressed, container, cylinder, cylinders, danger, energy, equipment, factory, flammable, fuel, gas, gauge, green, helium, high, hospital, hydrogen, industrial, industry, liquefied, liquid, manufacturing, medical, metal, meter, natural, o2, object, oxygen, pressure, production, propane, risk, steel, storage, tank, tanks, thread, tool, valve, welding, white,