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A
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SECTION A — HUMAN NECESSITIES
B
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SECTION B — PERFORMING OPERATIONSTRANSPORTING
C
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SECTION C — CHEMISTRYMETALLURGY
D
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SECTION D — TEXTILESPAPER
D01
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TEXTILES OR FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D01
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NATURAL OR ARTIFICIAL THREADS OR FIBRESSPINNING
D02
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YARNSMECHANICAL FINISHING OF YARNS OR ROPESWARPING OR BEAMING
D03
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WEAVING
D04
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BRAIDINGLACE-MAKINGKNITTINGTRIMMINGSNON-WOVEN FABRICS
D05
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SEWINGEMBROIDERINGTUFTING
D06
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TREATMENT OF TEXTILES OR THE LIKELAUNDERINGFLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
D07
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ROPESCABLES OTHER THAN ELECTRIC
D21
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PAPER
D21
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PAPER-MAKINGPRODUCTION OF CELLULOSE
D21B
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FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
D21C
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PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALSREGENERATION OF PULPING LIQUORSAPPARATUS THEREFOR
D21D
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TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE [5]
D21F
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PAPER-MAKING MACHINESMETHODS OF PRODUCING PAPER THEREON
D21G
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CALENDERSACCESSORIES FOR PAPER-MAKING MACHINES (winders or rewinders for finished products, means for adjustment of wrinkles or lateral extensions B65H)
D21H
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PULP COMPOSITIONSPREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C, D21DIMPREGNATING OR COATING OF PAPERTREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21GPAPER NOT OTHERWISE PROVIDED FOR [5]
D21H 11/00
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Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only [5]
D21H 13/00
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Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material (chemical features in the manufacture of artificial fibres D01F) [5]
D21H 15/00
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Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution [5]
D21H 17/00
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Non-fibrous material added to the pulp, characterised by its constitutionPaper-impregnating material characterised by its constitution [5]
D21H 19/00
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Coated paper (coated fibreboard D21J 1/08)Coating material (recording sheets characterised by the coating used to improve ink, dye or pigment receptivity B41M 5/50) [5]
D21H 21/00
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Non-fibrous material added to the pulp, characterised by its function, form or propertiesPaper impregnating or coating material, characterised by its function, form or properties [5]
D21H 23/00
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Processes or apparatus for adding material to the pulp or to the paper (applying liquids or other fluent material to surfaces, in general B05; processes for making continuous lengths of paper D21F 11/00) [5]
D21H 25/00
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After-treatment of paper not provided for in groups D21H 17/00-D21H 23/00 [5]
D21H 27/00
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Special paper not otherwise provided for, e.g. made by multi-step processes [5]
D21H 27/02
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Patterned paper (patterned coatings D21H 19/66; embossing B31F 1/07; prepared on the paper-making machines D21F 11/00) [5]
D21H 27/04
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. . marbled [5]
D21H 27/06
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Vegetable or imitation parchmentGlassine paper [5]
D21H 27/08
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Filter paper (self-supporting filtering material B01D 39/14; making on paper-making machines D21F 11/14) [5]
D21H 27/10
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Packing paper (packaging materials of special type or form B65D 65/38) [5]
D21H 27/12
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Electrically-insulating paper [5]
D21H 27/14
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Paper having stable form or dimensionCurl-resistant paper (anticoil photographic support G03C 1/81) [5]
D21H 27/16
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Pure paper, i.e. paper lacking or having low content of contaminants (after-treatment of cellulose pulp D21C 9/00) [5]
D21H 27/18
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Paper- or board-based structures for surface covering [5]
D21H 27/20
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. . Flexible structures being applied by the user, e.g. wallpaper (printed wallpapers B41M 3/18; paperhanging B44C 7/00; pregummed wallpaper C09J 7/04) [5]
D21H 27/22
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. . Structures being applied on the surface by special manufacturing processes, e.g. in presses [5]
D21H 27/24
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. . . characterised by the surface to be covered being phenolic-resin paper laminates, vulcan fibre or similar cellulosic fibreboards [5]
D21H 27/26
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. . . characterised by the overlay sheet or the top layers of the structures (decorative panels B44C 5/04; wood grain effects B44F 9/02) [5]
D21H 27/28
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. . . . treated to obtain specific resistance properties, e.g. against wear or weather (water-repelling agents D21H 21/16) [5]
D21H 27/30
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Multi-ply (for surface covering D21H 27/18; making on paper-making machines D21F 9/00, D21F 11/00) [5]
D21H 27/32
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. . with materials applied between the sheets (attaching together paper or cardboard sheets B31F 5/00; adhesives C09J) [5]
D21H 27/34
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. . . Continuous materials, e.g. filaments, sheets, nets [5]
D21H 27/36
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. . . . Films made from synthetic macromolecular compounds [5]
D21H 27/38
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. . at least one of the sheets having a fibrous composition differing from that of other sheets [5]
D21H 27/40
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. . at least one of the sheets being non-planar, e.g. crêped (creping or corrugating paper B31F) [5]
D21H 27/42
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. . comprising dry-laid paper [5]
D21J
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FIBREBOARDMANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MÂCHÉ (manufacture of articles by dry processes B27N)
D99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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