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Publication of FR539419ApublicationCriticalpatent/FR539419A/en
D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F1/00—Wet end of machines for making continuous webs of paper
D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
FR539419D1920-12-291921-08-16
Method and apparatus for recovering suspended solids from waste water from paper mills and the like
ExpiredFR539419A
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