Canada Tariff 2517.20.00 — Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete aggregates, for road metalling or for railway or other ballast, shingle and flint, whether or not heat-treated; macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in the first part of the heading; tarred macadam; granules, chippings and powder, of stones of heading 25.15 or 25.16, whether or not heat-treated. - Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10 Duty Rates

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