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главная система stresses
math.	Hauptsystem n
microel.	Master-System m
tech.	Wirtssystem n; Hauptsystem n (Nilov)

главная система: 45 phrases in 17 subjects

Astronomy	1
Automated equipment	3
Automobiles	12
Brewery	1
Chemistry	1
Computers	7
Construction	2
Energy industry	3
Information technology	1
Missiles	1
Nautical	3
Nuclear and fusion power	3
Oil / petroleum	1
Public utilities	1
Rail transport	2
Shipbuilding	2
Technology	1