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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
E
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SECTION E — FIXED CONSTRUCTIONS
F
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SECTION F — MECHANICAL ENGINEERINGLIGHTINGHEATINGWEAPONSBLASTING
F01
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ENGINES OR PUMPS
F01
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MACHINES OR ENGINES IN GENERALENGINE PLANTS IN GENERALSTEAM ENGINES
F02
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COMBUSTION ENGINESHOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
F03
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MACHINES OR ENGINES FOR LIQUIDSWIND, SPRING, OR WEIGHT MOTORSPRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
F04
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POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDSPUMPS FOR LIQUIDS OR ELASTIC FLUIDS
F15
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ENGINEERING IN GENERAL
F15
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FLUID-PRESSURE ACTUATORSHYDRAULICS OR PNEUMATICS IN GENERAL
F16
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ENGINEERING ELEMENTS OR UNITSGENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONSTHERMAL INSULATION IN GENERAL
F17
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STORING OR DISTRIBUTING GASES OR LIQUIDS
F21
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LIGHTINGHEATING
F21
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LIGHTING
F22
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STEAM GENERATION
F23
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COMBUSTION APPARATUSCOMBUSTION PROCESSES
F24
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HEATINGRANGESVENTILATING
F25
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REFRIGERATION OR COOLINGCOMBINED HEATING AND REFRIGERATION SYSTEMSHEAT PUMP SYSTEMSMANUFACTURE OR STORAGE OF ICELIQUEFACTION OR SOLIDIFICATION OF GASES
F26
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DRYING
F27
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FURNACESKILNSOVENSRETORTS [4]
F27B
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FURNACES, KILNS, OVENS, OR RETORTS IN GENERALOPEN SINTERING OR LIKE APPARATUS (combustion apparatus F23; electric heating H05B)
F27B 1/00
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Shaft or like vertical or substantially vertical furnaces (for preheating, burning, calcining or cooling lime, magnesia or dolomite C04B 2/12)
F27B 3/00
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Hearth-type furnaces, e.g. of reverberatory type (F27B 9/00-F27B 15/00, F27B 21/00 take precedence)Electric arc furnaces [4]
F27B 5/00
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Muffle furnacesRetort furnacesOther furnaces in which the charge is held completely isolated (F27B 9/00 takes precedence)
F27B 7/00
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Rotary-drum furnaces, i.e. horizontal or slightly inclined
F27B 9/00
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Furnaces through which the charge is moved mechanically, e.g. of tunnel type (F27B 7/14 takes precedence)Similar furnaces in which the charge moves by gravity
F27B 9/02
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of multiple-track typeof multiple-chamber typeCombinations of furnaces
F27B 9/04
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adapted for treating the charge in vacuum or special atmosphere
F27B 9/06
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heated without contact between combustion gases and chargeelectrically heated
F27B 9/08
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. . heated through chamber walls
F27B 9/10
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. . heated by hot air or gas
F27B 9/12
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with special arrangements for preheating or cooling the charge
F27B 9/14
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characterised by the path of the charge during treatmentcharacterised by the means by which the charge is moved during treatment (F27B 9/28 takes precedence; travelling or movable supports or containers for the charge F27D 3/12)
F27B 9/16
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. . the charge moving in a circular or arcuate path
F27B 9/18
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. . . under the action of scrapers or pushers
F27B 9/20
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. . the charge moving in a substantially straight path
F27B 9/22
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. . . under the action of scrapers or pushers (F27B 9/26 takes precedence)
F27B 9/24
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. . . being carried by a conveyer
F27B 9/26
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. . . on or in trucks, sleds, or containers
F27B 9/28
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for treating continuous lengths of work
F27B 9/30
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Details, accessories, or equipment peculiar to furnaces of these types
F27B 9/32
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. . Casings
F27B 9/34
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. . . Arrangements of linings
F27B 9/36
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. . Arrangements of heating devices
F27B 9/38
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. . Arrangement of devices for charging [4]
F27B 9/39
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. . Arrangement of devices for discharging [4]
F27B 9/40
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. . Arrangements of controlling or monitoring devices
F27B 11/00
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Bell-type furnaces (for treating metal strips or wire C21D 9/663)
F27B 13/00
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Furnaces with both stationary charge and progression of heating, e.g. of ring type, of type in which segmental kiln moves over stationary charge
F27B 14/00
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Crucible or pot furnacesTank furnaces [4]
F27B 15/00
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Fluidised-bed furnacesOther furnaces using or treating finely-divided materials in dispersion (combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C 10/00)
F27B 17/00
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Furnaces of a kind not covered by any of groups F27B 1/00-F27B 15/00 (structural combinations of furnaces F27B 19/02)
F27B 19/00
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Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B 1/00-F27B 17/00
F27B 21/00
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Open or uncovered sintering apparatusOther heat-treatment apparatus of like construction
F27D
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DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE (combustion apparatus F23; electric heating H05B)
F28
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HEAT EXCHANGE IN GENERAL
F41
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WEAPONSBLASTING
F41
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WEAPONS
F42
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AMMUNITIONBLASTING
F99
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SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]
G
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SECTION G — PHYSICS
H
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SECTION H — ELECTRICITY

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