37 Installation, maintenance and repair of metal hooks, boat hooks, flexible pipes, tubes and hoses, not of metal, breakwater structures of plastic or rubber, connection structures for breakwater structures of plastic or rubber, floating tubular devices of plastic or rubber, connection structures for floating tubular devices of plastic or rubber, water-filled flexible tubes of plastic or rubber, connection structures for water-filled flexible tubes of plastic or rubber, rubber cords, parts and accessories to the aforementioned goods, nets, tents and tarpaulins, awnings of textile or synthetic materials, sails, raw fibrous textile materials and substitutes therefor, cords, ropes, strings, slings, bands, nettings for breakwater structures, floating tubular devices and water-filled flexible tubes of plastic or rubber, and parts and accessories to the aforementioned goods