Non-precious metal ores; common metals and their alloys and semi-manufactured products of common metals and their alloys; metal building products for sheltering, preserving, conserving, covering, warehousing (including metal ladders), metal floors, metal staircases, metal gates and fences, metal railings for fences, metal roofing, metal palings; metal products manufactured for sifting, filtering and similar purposes, namely, metal window screens, drain traps (valves) of metal; metal doors and...