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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
D21F1/60—Cylinder moulds
FR594797D1925-02-101925-02-10
Rotating cylindrical sieve (round shape) for machines for making paper, cardboard and similar materials
ExpiredFR594797A
(en)