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первая производная stresses
combust., math.	first order derivative
math.	first-order derivative
oil	first derivative (dimock)

первая производная: 47 phrases in 18 subjects

Aerohydrodynamics	1
Astronautics	10
Automated equipment	2
Aviation	3
Cardiology	2
Electrical engineering	1
Electronics	1
Makarov	4
Mass media	1
Mathematics	2
Medical	2
Military	3
Missiles	4
Nautical	2
Spectroscopy	1
Surveying	2
Technology	5
Telecommunications	1