COMMON CUSTOMS TARIFF - TARIFF HEADINGS - ' ' TEXTILE ARTICLES OF A KIND COMMONLY USED IN MACHINERY OR PLANT ' ' WITHIN THE MEANING OF HEADING NO 59.17 - ' ' GLASS FIBRE ( INCLUDING WOOL ), YARN , FABRICS , AND ARTICLES MADE THEREFROM ' ' WITHIN THE MEANING OF HEADING NO 70.20 - AIR FILTERS - TARIFF CLASSIFICATION - CRITERIA