Drill pipe attachments, namely, metal drill collars; Elbows of metal for pipes; Elbows of metal for pipes including those from alloy steel and titanium; Metal clad pipes; Metal pipe collars; Metal pipe connectors; Metal pipe couplings and joints; Metal pipe fittings; Metal pipes; Metal pipes and metal fittings therefor; Metal pipes and tubes; Metal pipes for liquid and gas transfer; Metal tubes; Metal tubes for industrial use; Metal tubing; Metal valves not being parts of machines; Metallic p...