level reduction

: 43 phrases in 19 subjects

Aerohydrodynamics	1
Astronomy	1
Aviation	1
Business	2
Construction	1
General	2
Geophysics	1
Makarov	4
Medical	7
Military	1
Nanotechnology	2
Natural resourses and wildlife conservation	2
Nautical	3
Navigation	2
Oceanography & oceanology	1
Physics	3
Politics	4
Surveying	2
Technology	3