430	GASES, CONTAINERS, EQUIPMENT: LABORATORY, MEDICAL, AND WELDING
43012  *	Containers (For Liquefied Gases), Large Dewars (For Laboratory  Sizes, see Class 175)
43020  *	Filters, Natural and LPG Gas
43024  *	Gas Cylinder Carts, Clamps, and Stands, Hospital and Laboratory Type
43027  *	Gas Cylinders, Empty, Commercial Sizes
43030  *	Gases, Radioactive Counting: Methane, PR-Gas, Q-Gas, etc.
43033  *	Gas Mixtures, Special Purpose
43036  *	Gas Regulators, Gauges, Fittings, and Parts
43042  *	Laboratory Gases: Argon, Carbon Dioxide, Helium, Hydrogen, Nitrogen, etc.
43048  *	Medical Gases (For Anesthesia and Respiration Therapy): Carbon Dioxide, Cyclopropane, Nitrous Oxide, (Pure) Oxygen, etc.
43063  *	Purifiers (For Gases): Soda Lime, etc.
43072  *	Rare or Highly Purified Gases (For Research Uses, etc.)
43084  *	Sterilizing Gases: Ethylene Oxide, etc.
43092  *	Welding and Industrial Gases: Acetylene, Argon, Carbon Dioxide, Oxygen, etc.