IPC 2013 : D21C 7/04 : Linings.

IPC2013 > D > D21 > D21C > D21C 7/00 > D21C 7/04[1] > Linings.
D SECTION D — TEXTILES; PAPER.
D21 PAPER-MAKING; PRODUCTION OF CELLULOSE.
D21C PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR.
D21C 7/00 Digesters.
D21C 7/04 · Linings.