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D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
D21D5/02—Straining or screening the pulp
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FR821345D1936-09-261937-04-30Procédé de fabrication d'une matière fibreuse pure, non feutrée, en particulier d'une matière cellulosique
ExpiredFR821345A
(fr)