Elbows of metal for pipes; junctions of metal for pipes; valves of metal (other than parts of machines); pipework of metal; rings of metal; manifolds of metal for pipelines; pipes of metal; washers of metal; bottle closures of metal; bottles (metal containers) for compressed gas or liquid air

Electrical fuses

Electrical switches

High voltage electrical components and subsystems, consisting of relays, contactors, and capacitors, used in transmitting and measuring electrical power