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Système harmonisé
Section V > Chapitre 25 > Position 2508 > 2508.70
Chamotte or dinas earths
Section V > Chapitre 25 > Position 2510
Natural calcium phosphates, natural aluminium calcium phosphates and phosphatic chalk.
Section V > Chapitre 25 > Position 2511
Natural barium sulphate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading 28.16.
Section V > Chapitre 25 > Position 2511 > 2511.10
Natural barium sulphate (barytes)
Section V > Chapitre 25 > Position 2511 > 2511.20
Natural barium carbonate (witherite)
Section V > Chapitre 25 > Position 2512 > 2512.00
Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less