[Building materials, namely, roofing of plastic and wood and combined in part of metal, for covering liquids in open or covered containers, namely, storage tanks, transport tanks, cisterns, silos, swimming pools, ponds, ponds for waste water plants, as well as for covering pits, halls and sports facilities]

Roofing, Made Primarily of Metal, for Fluid Storage Containers Such as Tanks, Cisterns, Silos, Swimming Pools and Sewage Treatment Pools and Pits and for Large Spaces Such as Auditoria and Sports Arenas