Common metals, raw and semi-finished non precious metals and their alloys; billets, blooms, bars and rolls of common metals, raw and semi-finished non precious metals and their alloys; corrosion resistant special steels in the air, in the water and in the sea water; special steels for the manufacture of propeller-holder axis, pump axis, rudder axis; special steels for bolting and linkage; special steels for aeronautic use; and all other goods in this class