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Harmonic Progression
math., abbr.	HP

Harmonic: 315 phrases in 39 subjects

Analytical chemistry	6
Astronomy	2
Automobiles	1
Coal	6
Communications	30
Computer numerical control	3
Construction	4
Cultural studies	1
Earth sciences	3
Electric motors	1
Electric traction	1
Electricity generation	2
Electronics	46
Gear train	1
General	10
High energy physics	4
Industry	1
Information technology	3
Life sciences	7
Magnetics	5
Mathematics	19
Measuring instruments	18
Mechanic engineering	3
Medical	1
Medical appliances	1
Metallurgy	3
Microelectronics	1
Optics branch of physics	2
Pharmacy and pharmacology	2
Physics	70
Power electronics	3
Radio	2
Scientific	4
Sound recording	1
Statistics	5
Technology	39
Telecommunications	1
Telephony	1
Transport	2