P 3

Sandwich panels of metal for air conditioning ducts; panels of metal for further manufacture; metal section bars to connect pre-insulated air ducts; sandwich panelled ventilation ducts of metal for air conditioning apparatus; metal air conditioning ducts, metal heating ducts, ventilating ducts of metal

Sandwich panelled ventilation and air force ducts as part of air conditioning apparatus; ducts as part of air ventilation apparatus

Structural insulated construction panels; acoustical panels for buildings; semi-processed plastic in the form of films, sheets, tubes, bars, or rods; non metallic flexible tubes, pipes and hoses

Sandwich panelled ventilation ducts, not of metal, for air conditioning apparatus; non-metal sandwich panels for air conditioning ducts; panels, not of metal, for further manufacture, used in building construction; non-metal air conditioning ducts; non-metal ducts not for electrical circuitry; non-metal heating ducts; non-metal ventilating ducts