9
electrical material, namely, electrical connections for conductors and/or cables and/or other wires, electrical conductors, electrical heating cables, [ thermostats ] ; electrical wires and cables, fibre optic cables or other wires not of metal
11
[installations for heating, refrigerating, water supply and sanitary purposes, namely, (1) regulators for pipes and or tubes for the distribution of hot water, cold water, and or low temperature water, water for sanitary purposes, for supplying radiators, (2) high vertical piping systems not of metal, namely, tube column, riser pipes, rising main, supply pipes]
17
[installations for heating, refrigerating, water supply and sanitary purposes, namely, (1) piping systems not of metal, namely, tubes, pipes, pre assembled mainfolds, manifolds and tapes, (2) polyethylene tubes and pipes; pipes for heating not of metal, pipes for water supply not of metal; packing, stopping and insulating materials, namely, insulators for cable, dielectric insulators, insulators for electric ducts, seal packings, polystyrene thermal insulating and soundproofing slabs, peripheral thermal insulating and soundproofing strips of polyethylene foam or of polyurethane foam]