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 · Web viewand flint, whether or not head-treated. 25172000 - Macadam of slag, dross or similar 4 US 0. industrial waste, whether or not . incorporating the materials cited in . subheading No.2517.10. 25173000 - Tarred macadam 4 US 0 - Granules, chipping and powder, of . stones of heading No.25.15 or 25.16, whether or not heat-treated:25174100 -- Of