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D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F1/00—Wet end of machines for making continuous webs of paper
D21F1/02—Head boxes of Fourdrinier machines
FR983510A1964-07-291964-07-29Appareil pour répartir uniformément des fibres dans la pâte à papier d'une machine à fabriquer le papier
ExpiredFR1402580A
(fr)