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один в один stresses
gen.	one and the same (Chichikov); the same (Soulbringer)
idiom.	as like as two peas (SirReal); spitting image of someone (the exact double of (another person or thing) Jekyll Grim Payne)
sport.	one-on-one
"один-в-один"
el.	one-for-one (напр. о преобразовании); one-to-one (напр. о преобразовании)

один в один: 5808 phrases in 270 subjects

Abbreviation	2
Accounting	22
Acoustics	1
Advertising	21
Aerohydrodynamics	5
Agriculture	26
Agrochemistry	1
Airports and air traffic control	2
Alcohol distilling	1
American usage, not spelling	36
Animal husbandry	11
Antennas and waveguides	9
Apollo-Soyuz	1
Applied mathematics	2
Arabic language	1
Architecture	31
Armored vehicles	12
Artificial intelligence	1
Artillery	7
Astronautics	19
Astronomy	1
Australian	6
Automated equipment	53
Automatic control	2
Automobiles	53
Aviation	34
Aviation medicine	7
Banking	59
Baseball	3
Basketball	12
Biochemistry	1
Biology	21
Biotechnology	9
Bookish / literary	6
Botany	5
British usage, not spelling	9
British English spelling	2
Business	60
Cables and cable production	5
Canada	2
Card games	3
Cartography	7
Caspian	1
Cement	8
Chat and Internet slang	1
Chemistry	23
Chess	39
Cinematography	21
Clerical	1
Cliche / convention	2
Clinical trial	3
Clothing	1
Combustion gas turbines	1
Commerce	5
Communications	6
Computer games	2
Computer graphics	1
Computer networks	26
Computers	15
Construction	117
Cooking	2
Corporate governance	2
Cycling other than sport	3
Data processing	1
Databases	2
Demography	2
Dialectal	1
Diplomacy	19
Drawing	1
Drilling	15
Ecology	8
Economy	125
Education	8
Elections	1
Electrical engineering	8
Electrochemistry	3
Electronics	68
Electrophoresis	1
Energy industry	17
Energy system	1
Equestrian sports	1
Euphemistic	10
European Bank for Reconstruction and Development	29
European Union	1
Explanatory translation	4
Facilities	1
Fairy tales	1
Fantasy and science fiction	2
Fashion	2
Figurative	6
Figure of speech	3
Finances	20
Firefighting and fire-control systems	7
Food industry	5
Food service and catering	1
Football	11
Foreign affairs	2
Foreign exchange market	1
Forestry	14
Formal	1
Gambling	2
Gas processing plants	4
General	1200
Genetics	6
Geology	22
Geophysics	14
Gloomy	1
Grammar	1
Gymnastics	7
Gyroscopes	1
Hairdressing	1
Handball	1
Heraldry	5
Hi-Fi	1
Historical	9
Horse racing	4
Horticulture	1
Hotel industry	2
Household appliances	3
Human resources	1
Humorous / Jocular	1
Hydraulic engineering	1
Hydrobiology	3
Hydrology	5
Ice hockey	20
Idiomatic	41
Immunology	5
Informal	55
Information security and data protection	8
Information technology	52
Insurance	3
Intelligence and security services	3
International Monetary Fund	3
Internet	8
Investment	17
Ironical	1
Jamaican English	1
Journalism terminology	1
Kayaking	2
Laboratory equipment	1
Latin	3
Law	99
Leather	1
Librarianship	45
Linguistics	4
Literally	2
Literature	15
Logging	1
Logistics	7
Makarov	639
Marketing	1
Mass media	775
Mathematics	48
Meaning 2	1
Measuring instruments	1
Mechanic engineering	42
Mechanics	9
Medical	67
Melioration	1
Metallurgy	15
Meteorology	1
Metrology	7
Microelectronics	4
Microsoft	6
Military	126
Military lingo	1
Mining	42
Missiles	2
Misused	1
Mobile and cellular communications	1
Music	6
Nanotechnology	13
Nautical	30
Navigation	3
Notarial practice	7
Nuclear physics	4
Numismatics	1
Obsolete / dated	16
Oceanography & oceanology	2
Office equipment	2
Oil / petroleum	35
Oil and gas	12
Oil and gas technology	5
Oil processing plants	1
Oilfields	6
Optics branch of physics	1
Packaging	4
Painting	1
Patents	12
Perfume	9
Pharmacology	8
Pharmacy and pharmacology	5
Philosophy	2
Physics	4
Physiology	2
Plastics	6
Politics	7
Polygraphy	28
Polymers	7
Power system protection	2
Production	14
Programming	156
Proper and figurative	1
Proverb	61
Psychology	9
Public utilities	1
Publishing	1
Pulp and paper industry	1
Quality control and standards	13
Quantum electronics	1
Quotes and aphorisms	8
Radio	1
Radiography	2
Radiology	1
Rail transport	26
Refrigeration	1
Religion	8
Remote sensing	1
Rhetoric	3
Road works	26
Roll stock	6
Sakhalin	9
Sakhalin R	4
SAP	1
Saying	4
Scientific	14
Scottish usage	1
Security systems	7
Seismology	7
Shipbuilding	7
Skydiving	1
Slang	48
Sociology	2
Software	1
Soil science	3
Spectroscopy	1
Sports	78
Statistics	3
Stock Exchange	3
Surgery	2
Taxes	5
Technology	123
Teenager slang	1
Telecommunications	23
Television	6
Tennis	1
Textile industry	42
Theatre	3
Thermal engineering	4
Tibetan	2
Torpedoes	1
Trade unions	1
Transport	22
Travel	3
Uncommon / rare	5
United Nations	1
United States	1
University	1
Vernacular language	1
Virology	1
Vulgar	4
Water polo	1
Water resources	2
Water supply	1
Weapons and gunsmithing	3
Winemaking	12
Wood processing	18
Wrestling	2
Yachting	1
Zoology	1