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D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C7/00—Digesters
D21C7/14—Means for circulating the lye
FR617479D1925-07-071926-06-12
Method and apparatus for processing plant material
ExpiredFR617479A
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