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A
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HUMAN NECESSITIES
B
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PERFORMING OPERATIONSTRANSPORTING
C
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CHEMISTRYMETALLURGY
C01
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CHEMISTRY
C01
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INORGANIC CHEMISTRY
C01B
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NON-METALLIC ELEMENTSCOMPOUNDS THEREOF (fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00;  production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)
C01B 3/00
HydrogenHydridesWaterSynthesis gas from hydrocarbons
C01B 3/00
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HydrogenGaseous mixtures containing hydrogenSeparation of hydrogen from mixtures containing itPurification of hydrogen (production of water-gas or synthesis gas from solid carbonaceous material C10J) [3, 2006.01]
C01B 4/00
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Hydrogen isotopesInorganic compounds thereof prepared by isotope exchange, e.g. NH3 + D2 → NH2D + HD [1, 2, 2006.01]
C01B 5/00
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Water [1, 2006.01]
C01B 6/00
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Hydrides of metalsMonoborane or diboraneAddition complexes thereof [1, 2, 2006.01]
C01B 7/00
HalogensCompounds thereof
C01B 7/00
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HalogensHalogen acids [1, 2006.01]
C01B 9/00
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General methods of preparing halides (particular individual halides, see the relevant groups in subclasses C01B-C01G according to the element combined with the halogen; electrolytic production of inorganic compounds C25B) [1, 2006.01]
C01B 11/00
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Oxides or oxyacids of halogensSalts thereof [1, 2006.01]
C01B 13/00
OxygenOxides or hydroxides in generalPer-compounds
C01B 13/00
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OxygenOzoneOxides or hydroxides in general [1, 2006.01]
C01B 15/00
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PeroxidesPeroxyhydratesPeroxyacids or salts thereofSuperoxidesOzonides [1, 2006.01]
C01B 17/00

C01B 17/00
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SulfurCompounds thereof [1, 2006.01]
C01B 19/00
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SeleniumTelluriumCompounds thereof [1, 2006.01]
C01B 21/00
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NitrogenCompounds thereof [1, 2006.01]
C01B 23/00
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Noble gasesCompounds thereof (liquefying F25J) [1, 2006.01]
C01B 25/00
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PhosphorusCompounds thereof (C01B 21/00, C01B 23/00 take precedence; perphosphates C01B 15/16) [1, 3, 2006.01]
C01B 32/00
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CarbonCompounds thereof (C01B 21/00, C01B 23/00 take precedence;  percarbonates C01B 15/10;  carbon black C09C 1/48) [2017.01]
C01B 33/00
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SiliconCompounds thereof (C01B 21/00, C01B 23/00 take precedence;  persilicates C01B 15/14;  carbides C01B 32/956) [1, 3, 2006.01]
C01B 33/02
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Silicon (forming single crystals or homogeneous polycrystalline material with defined structure C30B) [1, 5, 2006.01]
C01B 33/021
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. . Preparation (chemical coating from the vapour phase C23C 16/00) [5, 2006.01]
C01B 33/023
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. . . by reduction of silica or silica-containing material [5, 2006.01]
C01B 33/025
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. . . . with carbon or a solid carbonaceous material, i.e. carbo-thermal process [5, 2006.01]
C01B 33/027
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. . . by decomposition or reduction of gaseous or vaporised silicon compounds other than silica or silica-containing material [5, 2006.01]
C01B 33/029
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. . . . by decomposition of monosilane [5, 2006.01]
C01B 33/03
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. . . . by decomposition of silicon halides or halosilanes or reduction thereof with hydrogen as the only reducing agent [5, 2006.01]
C01B 33/031
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. . . . . by decomposition of silicon tetraiodide [5, 2006.01]
C01B 33/033
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. . . . by reduction of silicon halides or halosilanes with a metal or a metallic alloy as the only reducing agents [5, 2006.01]
C01B 33/035
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. . . . by decomposition or reduction of gaseous or vaporised silicon compounds in the presence of heated filaments of silicon, carbon or a refractory metal, e.g. tantalum or tungsten, or in the presence of heated silicon rods on which the formed silicon is deposited, a silicon rod being obtained, e.g. Siemens process [5, 2006.01]
C01B 33/037
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. . Purification (by zone-melting C30B 13/00) [5, 2006.01]
C01B 33/039
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. . . by conversion of the silicon into a compound, optional purification of the compound, and reconversion into silicon [5, 2006.01]
C01B 33/04
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Hydrides of silicon [1, 2006.01]
C01B 33/06
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Metal silicides [1, 2006.01]
C01B 33/08
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Compounds containing halogen [1, 2006.01]
C01B 33/10
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. . Compounds containing silicon, fluorine, and other elements [1, 2006.01]
C01B 33/107
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. . Halogenated silanes [3, 2006.01]
C01B 33/113
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Silicon oxidesHydrates thereof [3, 2006.01]
C01B 33/12
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. . SilicaHydrates thereof, e.g. lepidoic silicic acid [1, 3, 2006.01]
C01B 33/14
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. . . Colloidal silica, e.g. dispersions, gels, sols [1, 3, 2006.01]
C01B 33/141
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. . . . Preparation of hydrosols or aqueous dispersions [3, 2006.01]
C01B 33/142
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. . . . . by acidic treatment of silicates [3, 2006.01]
C01B 33/143
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. . . . . . of aqueous solutions of silicates [3, 2006.01]
C01B 33/145
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. . . . Preparation of hydroorganosols, organosols or dispersions in an organic medium [3, 2006.01]
C01B 33/146
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. . . . After-treatment of sols (preparation of hydroorganosols, organosols or dispersions in an organic medium from hydrosols C01B 33/145) [3, 2006.01]
C01B 33/148
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. . . . . ConcentrationDryingDehydrationStabilisationPurification [3, 2006.01]
C01B 33/149
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. . . . . Coating [3, 2006.01]
C01B 33/151
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. . . . . by progressively adding a sol to a different sol, i.e. "build up" of particles using a "heel" [3, 2006.01]
C01B 33/152
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. . . . Preparation of hydrogels [3, 2006.01]
C01B 33/154
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. . . . . by acidic treatment of aqueous silicate solutions [3, 2006.01]
C01B 33/155
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. . . . Preparation of hydroorganogels or organogels [3, 2006.01]
C01B 33/157
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. . . . After-treatment of gels [3, 2006.01]
C01B 33/158
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. . . . . PurificationDryingDehydrating [3, 2006.01]
C01B 33/159
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. . . . . Coating or hydrophobisation [3, 2006.01]
C01B 33/16
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. . . Preparation of silica xerogels [1, 3, 2006.01]
C01B 33/18
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. . . Preparation of finely divided silica neither in sol nor in gel formAfter-treatment thereof (treatment to enhance the pigmenting or filling properties C09C) [1, 3, 2006.01]
C01B 33/187
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. . . . by acidic treatment of silicates [3, 2006.01]
C01B 33/193
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. . . . . of aqueous solutions of silicates [3, 2006.01]
C01B 33/20
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Silicates (persilicates C01B 15/14) [1, 2006.01]
C01B 33/22
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. . Magnesium silicates [1, 2006.01]
C01B 33/24
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. . Alkaline earth metal silicates [1, 2006.01]
C01B 33/26
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. . Aluminium-containing silicates [1, 5, 2006.01]
C01B 33/32
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. . Alkali metal silicates (C01B 33/26 takes precedence) [1, 3, 2006.01]
C01B 33/36
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. . having base-exchange properties but not having molecular sieve properties [6, 2006.01]
C01B 33/38
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. . . Layered base-exchange silicates, e.g. clays, micas or alkali metal silicates of kenyaite or magadiite type [6, 2006.01]
C01B 33/40
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. . . . Clays [6, 2006.01]
C01B 33/42
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. . . . Micas [6, 2006.01]
C01B 33/44
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. . . . Products obtained from layered base-exchange silicates by ion-exchange with organic compounds such as ammonium, phosphonium or sulfonium compounds or by intercalation of organic compounds, e.g. organoclay material [6, 2006.01]
C01B 33/46
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. . . Amorphous silicates, e.g. so-called "amorphous zeolites" [6, 2006.01]
C01B 35/00
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BoronCompounds thereof (monoborane, diborane, metal borohydrides or addition complexes thereof C01B 6/00;  perborates C01B 15/12;  binary compounds with nitrogen C01B 21/06;  phosphides C01B 25/08;  carbides C01B 32/991) [1, 2, 2006.01]
C01B 37/00
Compounds characterised primarily by their physical or chemical properties, rather than by their chemical constitution [6]
C01B 37/00
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Compounds having molecular sieve properties but not having base-exchange properties [6, 2006.01]
C01B 39/00
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Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolitesTheir preparationAfter-treatment, e.g. ion-exchange or dealumination (treatment to modify the sorption properties, e.g. shaping using a binder, B01J 20/10; treatment to modify the catalytic properties, e.g. combination of treatments to make the zeolites appropriate to their use as a catalyst, B01J 29/04; treatment to improve the ion-exchange properties B01J 39/14) [6, 2006.01]
C01C
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AMMONIACYANOGENCOMPOUNDS THEREOF (salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; azides C01B 21/08; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00; fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)
C01D
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COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM (metal hydrides C01B 6/00;  salts of oxyacids of halogens C01B 11/00;  peroxides, salts of peroxyacids C01B 15/00;  sulfides or polysulfides C01B 17/22;  thiosulfates, dithionites, polythionates C01B 17/64;  compounds containing selenium or tellurium C01B 19/00;  binary compounds of nitrogen with metals C01B 21/06;  azides C01B 21/08;  metal amides C01B 21/092;  nitrites C01B 21/50;  phosphides C01B 25/08;  salts of oxyacids of phosphorus C01B 25/16;  carbides C01B 32/90;  compounds containing silicon C01B 33/00;  compounds containing boron C01B 35/00;  cyanides C01C 3/08;  salts of cyanic acid C01C 3/14;  salts of cyanamide C01C 3/16;  thiocyanates C01C 3/20;  fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00;  obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal C22B;  production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)
C01F
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COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE EARTH METALS (metal hydrides C01B 6/00; salts of oxyacids of halogens C01B 11/00; peroxides, salts of peroxyacids C01B 15/00; sulfides or polysulfides of magnesium, calcium, strontium, or barium C01B 17/42; thiosulfates, dithionites, polythionates C01B 17/64; compounds containing selenium or tellurium C01B 19/00; binary compounds of nitrogen with metals C01B 21/06; azides C01B 21/08; metal amides C01B 21/092; nitrites C01B 21/50; phosphides C01B 25/08; salts of oxyacids of phosphorus C01B 25/16; carbides C01B 32/90;  compounds containing silicon C01B 33/00; compounds containing boron C01B 35/00; compounds having molecular sieve properties but not having base-exchange properties C01B 37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B 39/00; cyanides C01C 3/08; salts of cyanic acid C01C 3/14; salts of cyanamide C01C 3/16; thiocyanates C01C 3/20;  fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00; obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal C22B; production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)
C01G
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COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides C01B 6/00;  salts of oxyacids of halogens C01B 11/00;  peroxides, salts of peroxyacids C01B 15/00;  thiosulfates, dithionites, polythionates C01B 17/64;  compounds containing selenium or tellurium C01B 19/00;  binary compounds of nitrogen with metals C01B 21/06;  azides C01B 21/08;  metal amides C01B 21/092;  nitrites C01B 21/50;  phosphides C01B 25/08;  salts of oxyacids of phosphorus C01B 25/16;  carbides C01B 32/90;  compounds containing silicon C01B 33/00;  compounds containing boron C01B 35/00;  compounds having molecular sieve properties but not having base-exchange properties C01B 37/00;  compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B 39/00;  cyanides C01C 3/08;  salts of cyanic acid C01C 3/14;  salts of cyanamide C01C 3/16;  thiocyanates C01C 3/20;  fermentation or enzyme-using processes for the preparation of elements or inorganic compounds except carbon dioxide C12P 3/00;  obtaining metal compounds from mixtures, e.g. ores, which are intermediate compounds in a metallurgical process for obtaining a free metal C21B, C22B;  production of non-metallic elements or inorganic compounds by electrolysis or electrophoresis C25B)
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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SKINSHIDESPELTS OR LEATHER
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]
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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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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