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OECD International Trade
International Trade By Commodity Statistics (SITC Rev. 3)
6: Manufactured goods
66: Non metallic mineral manufactures, n.e.s.
662: Clay construction, refracto. construction materials
6623: Refractory construction materials (e.g. bricks)
66232: Refractory bricks, simi. refract. goods (excluding66231)
66232: Refractory bricks, simi. refract. goods (excluding66231)
66232: Refractory bricks, simi. refract. goods (excluding66231)
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