Receptacles, containers and tanks of metal for use in the storage and transportation of gas and/or oil; cylinders of metal for use in the storage and transportation of gas and/or oil, sold empty; Receptacles, containers and tanks of alloys of metal for use in the storage and transportation of gas and/or oil; cylinders of alloys of metal for use in the storage and transportation of gas and/or oil, sold empty; high pressure and low pressure containers, containers and tanks of metal or their all...