metal building materials, namely, closures and air transfer elements; transportable buildings; posts; non-electric cables and wires of common metal; ironmongery, namely, small items of metal hardware, namely wire clamps and band clamps; rigid, semi-flexible and flexible tubes and pipes of metal; goods of common metal, namely, union couplings and joints for pipes and tubes in the form of sleeves, muffs, flanges, flange sleeves and flange muffs; ventilation installations; metal chimneys and metal exhaust ducts; weatherproof louvers; and weather protection bars

portable electric heaters; steam generators; refrigerators; laundry driers; ventilating fans for commercial use; water and air purification units; water installation and sanitary equipment, namely, mountings, shower filters, water treatment plants, for use in bakeries, photographic labs, chemical industry and food industry; air conditioning installations for buildings; filtering units, namely, gas filtering units for assuring a breathable air and for industrial exhaust fume systems; liquid or fluid filtering units for producing a potable water for domestic use; and elements of the goods mentioned, namely, casings and filter media

non-metal building materials, namely, rigid, semi-flexible and flexible pipes; tubular noise suppressors as parts of ventilation installations; chimneys and gas ducts; weather protection bars; exhaust fume ducts; non-metal rigid pipes, namely, pipe armatures for ventilation to measure and regulate the flow, discharge and distribution for ventilation; temperature shrink bands; non-metal couplings for use with pipes and pipe tubes; casings, muffs and flanges