B PERFORMING OPERATIONS; TRANSPORTING
B29 WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29L INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
B29L2031/00 Other particular articles
B29L2031/731 Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres