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Containers of metal for compressed gas; Copper wire, not insulated; Ducts of metal, for central heating installations; Elbows of metal for pipes; Junctions of metal for pipes; Manually operated metal valves; Metal pipes; Metal, wash down spray nozzles for commercial and industrial use; Rods of metal for brazing and welding; Valves of metal, other than parts of machines; Water-pipe valves of metal; Water-pipes of metal