To produce, manufacture, refine, prepare, process, purchase, sell, import, export or generally deal in bricks, sand, stone, marble, tiles, refractories, china wares, sanitary materials, pipes, tubes, tubular structures, cement, paints, adhesive, sheets, roofing, glass, furniture, fittings, electrical goods, water supply or storage equipment, floor polish, door closures, concrete mixtures, elevators, paints, hardware, pipe, fittings, lubricant [...]