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C05B1/00—Superphosphates, i.e. fertilisers produced by reacting rock or bone phosphates with sulfuric or phosphoric acid in such amounts and concentrations as to yield solid products directly
C05B1/02—Superphosphates
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FR535043D1921-05-041921-05-04Perfectionnements aux engrais
ExpiredFR535043A
(fr)