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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
F03B
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MACHINES OR ENGINES FOR LIQUIDS (machines or engines for liquids and elastic fluids F01; positive-displacement engines for liquids F03C; positive-displacement machines for liquids F04)
F03C
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POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS (positive-displacement engines for liquids and elastic fluids F01; positive-displacement machines for liquids F04; fluid-pressure actuators F15B; fluid gearing F16H)
F03C 1/00
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Reciprocating-piston liquid engines
F03C 1/007
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with single cylinder, double-acting piston [5]
F03C 1/013
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with single cylinder, single-acting piston [5]
F03C 1/02
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with multiple cylinders, characterised by the number or arrangement of cylinders (with movable cylinders F03C 1/22; of flexible-wall type F03C 7/00)
F03C 1/03
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. . with movement in two directions being obtained by two single-acting piston liquid engines, each acting in one direction [5]
F03C 1/04
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. . with cylinders in star- or fan-arrangement
F03C 1/047
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. . . the pistons co-operating with an actuated element at the outer ends of the cylinders [5]
F03C 1/053
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. . . the pistons co-operating with an actuated element at the inner ends of the cylinders [5]
F03C 1/06
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. . with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
F03C 1/08
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Distributing valve-gear peculiar thereto (for multiple-cylinder engines F03C 1/34; for engines with positive displacement in general F01L)
F03C 1/10
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. . actuated by piston or piston-rod
F03C 1/12
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. . . mechanically [5]
F03C 1/14
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. . actuated by the driving liquid of the engine [5]
F03C 1/16
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. . Speed controlling, equalising, or cushioning [5]
F03C 1/20
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. . specially adapted for engines generating vibration only
F03C 1/22
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with movable cylinders
F03C 1/24
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. . in which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders
F03C 1/247
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. . . with cylinders in star- or fan-arrangement [5]
F03C 1/253
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. . . with cylinder axes generally coaxial with, or parallel to, main shaft axis [5]
F03C 1/26
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adapted for special use or combined with apparatus driven thereby (aspects predominantly concerning the driven apparatus, see the relevant classes for such apparatus)
F03C 1/28
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Pistons specially adapted therefor [5]
F03C 1/30
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Cams specially adapted therefor [5]
F03C 1/32
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Cylinders specially adapted therefor [5]
F03C 1/34
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Distribution members specially adapted for multiple-cylinder engines [5]
F03C 1/36
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. . Cylindrical distribution members [5]
F03C 1/38
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. . Plate-like distribution members [5]
F03C 1/40
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Control specially adapted therefor [5]
F03C 2/00
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Rotary-piston engines (in which the liquid exclusively displaces one or more piston reciprocating in rotary cylinders F03C 1/24) [3]
F03C 4/00
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Oscillating-piston engines [3]
F03C 7/00
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Engines of flexible-wall type [2010.01]
F03C 99/00
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Subject matter not provided for in other groups of this subclass [2010.01]
F03D
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WIND MOTORS
F03G
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SPRING, WEIGHT, INERTIA, OR LIKE MOTORSMECHANICAL-POWER-PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR (arrangements in connection with power supply in vehicles from force of nature B60K 16/00; electric propulsion with power supply in vehicles from force of nature B60L 8/00)
F03H
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PRODUCING A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR (from combustion products F02K)
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]
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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