2508.30 Fire-clay 2508.30.00 D 2508.30.00 A 2508.30.01 D
2508.40 Other clays(exc expanded clays of 68.06) 2508.40.00 D 2508.40.00 A 2508.40.99 A
2508.50 Andalusite, kyanite and sillimanite 2508.50.00 D 2508.50.00 D 2508.50.01 A
North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 90 / 531 题