2523.10 Cement clinkers 2523.10.00 D 2523.10.00 D 2523.10.01 B
2523.21 Portland cement, white, whether or not artificially coloured 2523.21.00 B 2523.21.00 A 2523.21.01 B
North American Free Trade Agreement, 1992 Oct. 7 Tariff Phasing Descriptions · 第 101 / 531 题