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A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
B01
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SEPARATINGMIXING
B01
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PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01B
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BOILINGBOILING APPARATUS
B01D
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SEPARATION (separating solids from solids by wet methods B03B, B03D, by pneumatic jigs or tables B03B, by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges B04B;  vortex apparatus B04C; presses per se for squeezing-out liquid from liquid-containing material B30B 9/02) [5]
B01D 1/00
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Evaporating (drying solid materials or objects by evaporating liquids therefrom F26B) [1, 2006.01]
B01D 3/00
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Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping [1, 2, 2006.01]
B01D 5/00
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Condensation of vapoursRecovering volatile solvents by condensation (B01D 8/00 takes precedence; condensers F28B) [1, 3, 2006.01]
B01D 7/00
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Sublimation (B01D 8/00 takes precedence; freeze-drying F26) [1, 2006.01]
B01D 8/00
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Cold trapsCold baffles [3, 2006.01]
B01D 9/00
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Crystallisation (crystallisation directly from the vapour phase B01D 7/02; making single crystals C30B) [1, 2006.01]
B01D 11/00
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Solvent extraction [1, 2006.01]
B01D 12/00
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Displacing liquid, e.g. from wet solids or from dispersions of liquids or from solids in liquids, by means of another liquid [1, 2006.01]
B01D 15/00
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Separating processes involving the treatment of liquids with solid sorbentsApparatus therefor [1, 4, 2006.01]
B01D 17/00
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Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion [1, 2006.01]
B01D 17/02
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Separation of non-miscible liquids [1, 2006.01]
B01D 17/022
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. . by contact with a preferentially wettable solid [4, 2006.01]
B01D 17/025
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. . by gravity, in a settling tank [4, 2006.01]
B01D 17/028
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. . . provided with a set of baffles [4, 2006.01]
B01D 17/032
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. . . provided with special equipment for removing at least one of the separated liquids [4, 2006.01]
B01D 17/035
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. . by using gas-bubbles or moving solids introduced into the mixture [4, 2006.01]
B01D 17/038
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. . by centrifugal force (centrifuges B04B; cyclones B04C) [4, 2006.01]
B01D 17/04
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. . Breaking emulsions [1, 2006.01]
B01D 17/05
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. . . by chemical treatment [4, 2006.01]
B01D 17/06
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Separation of liquids from each other by electricity [1, 2006.01]
B01D 17/09
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by thermal diffusion [4, 2006.01]
B01D 17/12
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Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits [4, 2006.01]
B01D 19/00
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Degasification of liquids [1, 2006.01]
B01D 21/00
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Separation of suspended solid particles from liquids by sedimentation (differential sedimentation B03D 3/00) [1, 2006.01]
B01D 24/00
FiltrationFiltering material, regeneration thereof [2]
B01D 24/00
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Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof (B01D 27/02 takes precedence) [5, 2006.01]
B01D 25/00
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Filters formed by clamping together several filtering elements or parts of such elements (disc filters B01D 29/39) [1, 5, 2006.01]
B01D 27/00
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Cartridge filters of the throw-away type [1, 5, 2006.01]
B01D 29/00
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Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D 24/00-B01D 27/00  Filtering elements therefor [1, 2006.01]
B01D 33/00
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Filters with filtering elements which move during the filtering operation (filters comprising loose filtering material moving or fluidised during filtration B01D 24/28-B01D 24/36; centrifuges B04B) [1, 5, 2006.01]
B01D 35/00
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Filtering devices having features not specifically covered by groups B01D 24/00-B01D 33/00, or for applications not specifically covered by groups B01D 24/00-B01D 33/00Auxiliary devices for filtrationFilter housing constructions [1, 2006.01]
B01D 36/00
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Filter circuits or combinations of filters with other separating devices (devices for the removal of gas, e.g. air purge systems B01D 35/01; magnetic or electrostatic separators combined with filters B03C) [4, 5, 2006.01]
B01D 37/00
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Processes of filtration (processes specially adapted for filtering gases B01D 46/00) [1, 2006.01]
B01D 39/00
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Filtering material for liquid or gaseous fluids [1, 2006.01]
B01D 41/00
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Regeneration of the filtering material or filter elements outside the filter for liquid or gaseous fluids [1, 2006.01]
B01D 43/00

B01D 43/00
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Separating particles from liquids, or liquids from solids, otherwise than by sedimentation or filtration (flotation processes B03D 1/00; drying solid materials or objects F26B) [1, 2006.01]
B01D 45/00
Separating dispersed particles from gases or vapours
B01D 45/00
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Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces [1, 2006.01]
B01D 46/00
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Filters or filtering processes specially modified for separating dispersed particles from gases or vapours  (filtering elements B01D 24/00-B01D 35/00;  filtering material B01D 39/00;  their regeneration outside the filters B01D 41/00) [1, 2006.01, 2022.01]
B01D 47/00
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Separating dispersed particles from gases, air or vapours by liquid as separating agent (B01D 45/10 takes precedence; fractionating columns or parts thereof B01D 3/16) [1, 2006.01]
B01D 49/00
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Separating dispersed particles from gases, air or vapours by other methods [1, 2006.01]
B01D 50/00
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Combinations of methods or devices for separating particles from gases or vapours [1, 2006.01, 2022.01]
B01D 51/00
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Auxiliary pretreatment of gases or vapours to be cleaned from dispersed particles [1, 6, 2006.01]
B01D 53/00

B01D 53/00
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Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols (recovery of volatile solvents by condensation B01D 5/00; sublimation B01D 7/00; cold traps, cold baffles B01D 8/00;  separation of difficult-to-condense gases or air by liquefaction F25J 3/00) [1, 3, 5, 2006.01]
B01D 57/00
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Separation, other than separation of solids, not fully covered by a single other group or subclass, e.g. B03C [1, 2006.01]
B01D 59/00
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Separation of different isotopes of the same chemical element [1, 2006.01]
B01D 61/00
Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus specially adapted thereforSemi-permeable membranes or their production [5]
B01D 61/00
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Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltrationApparatus, accessories or auxiliary operations specially adapted therefor (separation of gases or vapours by diffusion B01D 53/22) [5, 2006.01]
B01D 63/00
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Apparatus in general for separation processes using semi-permeable membranes [5, 2006.01]
B01D 65/00
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Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes [5, 2006.01]
B01D 67/00
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Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus [5, 2006.01]
B01D 69/00
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Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or propertiesManufacturing processes specially adapted therefor [5, 2006.01]
B01D 71/00
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Semi-permeable membranes for separation processes or apparatus characterised by the materialManufacturing processes specially adapted therefor [5, 2006.01]
B01F
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MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING  (mixing paints B44D 3/06)
B01J
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CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRYTHEIR RELEVANT APPARATUS [2]
B01L
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CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
B02
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CRUSHING, PULVERISING, OR DISINTEGRATINGPREPARATORY TREATMENT OF GRAIN FOR MILLING
B03
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SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGSMAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDSSEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS [5]
B04
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CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
B05
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SPRAYING OR ATOMISING IN GENERALAPPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL [2]
B06
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GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
B07
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SEPARATING SOLIDS FROM SOLIDSSORTING
B08
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CLEANING
B09
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DISPOSAL OF SOLID WASTERECLAMATION OF CONTAMINATED SOIL [3, 6]
B21
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SHAPING
B21
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MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIALPUNCHING METAL
B22
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CASTINGPOWDER METALLURGY
B23
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MACHINE TOOLSMETAL-WORKING NOT OTHERWISE PROVIDED FOR
B24
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GRINDINGPOLISHING
B25
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HAND TOOLSPORTABLE POWER-DRIVEN TOOLSHANDLES FOR HAND IMPLEMENTSWORKSHOP EQUIPMENTMANIPULATORS
B26
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HAND CUTTING TOOLSCUTTINGSEVERING
B27
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WORKING OR PRESERVING WOOD OR SIMILAR MATERIALNAILING OR STAPLING MACHINES IN GENERAL
B28
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WORKING CEMENT, CLAY, OR STONE
B29
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WORKING OF PLASTICSWORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B30
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PRESSES
B31
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MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPERWORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
B32
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LAYERED PRODUCTS
B33
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ADDITIVE MANUFACTURING TECHNOLOGY [2015.01]
B41
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PRINTING
B41
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PRINTINGLINING MACHINESTYPEWRITERSSTAMPS [4]
B42
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BOOKBINDINGALBUMSFILESSPECIAL PRINTED MATTER
B43
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WRITING OR DRAWING IMPLEMENTSBUREAU ACCESSORIES
B44
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DECORATIVE ARTS
B60
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TRANSPORTING
B60
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VEHICLES IN GENERAL
B61
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RAILWAYS
B62
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LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
B63
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SHIPS OR OTHER WATERBORNE VESSELSRELATED EQUIPMENT
B64
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AIRCRAFTAVIATIONCOSMONAUTICS
B65
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CONVEYINGPACKINGSTORINGHANDLING THIN OR FILAMENTARY MATERIAL
B66
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HOISTINGLIFTINGHAULING
B67
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OPENING OR CLOSING BOTTLES, JARS OR SIMILAR CONTAINERSLIQUID HANDLING
B68
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SADDLERYUPHOLSTERY
B81
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MICROSTRUCTURAL TECHNOLOGYNANOTECHNOLOGY
B81
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MICROSTRUCTURAL TECHNOLOGY [7]
B82
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NANOTECHNOLOGY [7]
B99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
C
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CHEMISTRYMETALLURGY
D
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TEXTILESPAPER
E
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FIXED CONSTRUCTIONS
F
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MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
G
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PHYSICS
H
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ELECTRICITY

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