Articles of iron castings, including parts of pumps and valves, namely iron wire, iron slabs, iron strips, steel; articles of steel castings namely, steel balls, still tubes, steel wire, steel strip, steel masts, steel sheets ; articles of metals and alloys other than iron and steel including parts of pumps and valves, namely, steel alloys, alloys of common metals; check valves of metal and alloy, namely, valves of metal, other than for parts of machines; foot valves of metal and alloy, namel...