Aluminum alloys; Elbows of metal for pipes including those from alloy steel and titanium; Fittings of metal for compressed air hoses; Iron and steel for use as raw materials for automobile parts; Junctions of metal for flexible pipes; Metal couplings for use with hydraulic and pneumatic systems; Metal elbows for pipes; Metal hose fittings; Metal pipe couplings and joints; Metal pipe fittings; Metal seals for water irrigation pipes; Metal thread adapters for use with hydraulic and pneumatic sy...