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D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
D21F5/00—Dryer section of machines for making continuous webs of paper
FR558344D1922-11-071922-11-07Procédé pour le réalésage sur place des entrées de vapeur aux sécheurs de machines à papier et appareils similaires
ExpiredFR558344A
(fr)