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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
C01
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CHEMISTRY
C01
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INORGANIC CHEMISTRY
C02
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TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C03
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GLASSMINERAL OR SLAG WOOL
C04
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CEMENTSCONCRETEARTIFICIAL STONECERAMICSREFRACTORIES [4]
C05
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FERTILISERSMANUFACTURE THEREOF [4]
C06
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EXPLOSIVESMATCHES
C07
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ORGANIC CHEMISTRY [2]
C08
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ORGANIC MACROMOLECULAR COMPOUNDSTHEIR PREPARATION OR CHEMICAL WORKING-UPCOMPOSITIONS BASED THEREON
C09
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DYESPAINTSPOLISHESNATURAL RESINSADHESIVESCOMPOSITIONS NOT OTHERWISE PROVIDED FORAPPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
C10
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PETROLEUM, GAS OR COKE INDUSTRIESTECHNICAL GASES CONTAINING CARBON MONOXIDEFUELSLUBRICANTSPEAT
C11
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ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXESFATTY ACIDS THEREFROMDETERGENTSCANDLES
C12
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BIOCHEMISTRYBEERSPIRITSWINEVINEGARMICROBIOLOGYENZYMOLOGYMUTATION OR GENETIC ENGINEERING
C13
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SUGAR INDUSTRY [4]
C14
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SKINSHIDESPELTSLEATHER
C21
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METALLURGY
C21
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METALLURGY OF IRON
C22
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METALLURGYFERROUS OR NON-FERROUS ALLOYSTREATMENT OF ALLOYS OR NON-FERROUS METALS
C23
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COATING METALLIC MATERIALCOATING MATERIAL WITH METALLIC MATERIALCHEMICAL SURFACE TREATMENTDIFFUSION TREATMENT OF METALLIC MATERIALCOATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERALINHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL [2]
C25
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ELECTROLYTIC OR ELECTROPHORETIC PROCESSESAPPARATUS THEREFOR [4]
C25B
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ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALSAPPARATUS THEREFOR (anodic or cathodic protection C23F 13/00; single-crystal growth C30B) [2]
C25C
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PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALSAPPARATUS THEREFOR (anodic or cathodic protection C23F 13/00; single-crystal growth C30B) [2]
C25C 1/00
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Electrolytic production, recovery or refining of metals by electrolysis of solutions (C25C 5/00 takes precedence) [2]
C25C 3/00
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Electrolytic production, recovery or refining of metals by electrolysis of melts (C25C 5/00 takes precedence) [2]
C25C 3/02
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of alkali or alkaline earth metals [2]
C25C 3/04
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of magnesium [2]
C25C 3/06
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of aluminium [2]
C25C 3/08
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. . Cell construction, e.g. bottoms, walls, cathodes [2]
C25C 3/10
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. . . External supporting frames or structures [2]
C25C 3/12
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. . . Anodes [2]
C25C 3/14
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. . Devices for feeding or crust breaking [2]
C25C 3/16
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. . Electric current supply devices, e.g. bus bars [2]
C25C 3/18
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. . Electrolytes [2]
C25C 3/20
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. . Automatic control or regulation of cells (controlling or regulating in general G05) [2]
C25C 3/22
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. . Collecting emitted gases [2]
C25C 3/24
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. . Refining [2]
C25C 3/26
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of titanium, zirconium, hafnium, tantalum or vanadium [2]
C25C 3/28
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. . of titanium [2]
C25C 3/30
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of manganese [2]
C25C 3/32
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of chromium [2]
C25C 3/34
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of metals not provided for in groups C25C 3/02-C25C 3/32 [2]
C25C 3/36
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Alloys obtained by cathodic reduction of all their ions [2]
C25C 5/00
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Electrolytic production, recovery or refining of metal powders or porous metal masses [2]
C25C 7/00
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Constructional parts, or assemblies thereof, of cellsServicing or operating of cells (for the production of aluminium C25C 3/06-C25C 3/22) [2]
C25D
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PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGSELECTROFORMING (manufacturing printed circuits by metal deposition H05K 3/18)JOINING WORKPIECES BY ELECTROLYSISAPPARATUS THEREFOR (anodic or cathodic protection C23F 13/00; single-crystal growth C30B) [2, 6]
C25F
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PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTSAPPARATUS THEREFOR (treatment of water, waste water or sewage by electrochemical methods C02F 1/46; anodic or cathodic protection C23F 13/00) [2]
C30
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CRYSTAL GROWTH [3]
C40
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COMBINATORIAL TECHNOLOGY [2006.01]
C40
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COMBINATORIAL TECHNOLOGY [2006.01]
C99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
D
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SECTION D — TEXTILESPAPER
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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