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C05B13/00—Fertilisers produced by pyrogenic processes from phosphatic materials
C05B13/02—Fertilisers produced by pyrogenic processes from phosphatic materials from rock phosphates
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FR1069437D1952-01-051953-01-05Procédé de fabrication d'engrais chimiques à partir de phosphates naturels, et produits obtenus par ce procédé
ExpiredFR1069437A
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