repair and maintenance of cryogenic storage tanks

natural gas fueling stations comprised primarily of fuel pumps and metal storage tanks sold as a unit

natural gas acoustic and electrical liquefaction machines

vacuum jacketed containment systems, components and accessories; namely, dewars, tanks and other containers for storing cryogenic liquids

trailers for transporting cryogenic liquids

LIQUID HYDROGEN TRANSFER LINES, LIQUID HYDROGEN TRANSFER LINE ADAPTERS AND LIQUID HYDROGEN FLEXIBLE TRANSFER LINE ASSEMBLIES

LOW TEMPERATURE GAS PROCESSING APPARATUS AND LIQUEFIED GAS HANDLING EQUIPMENT, PARTICULARLY LIQUID HYDROGEN DEWARS (STORAGE TANKS), LIQUID HYDROGEN AND HELIUM PURIFIERS, LIQUID HYDROGEN REFRIGERATOR/LIQUEFIER, LIQUID HYDROGEN TEST APPARATUS AND LIQUID HYDROGEN GAS SEPARATORS