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main operation stresses
IT	основная операция; основная работа
main operations
Apollo-Soyuz	основные операции

Main Operations : 41 phrases in 18 subjects

Air defense	1
Banking	5
Chess	2
Electrical engineering	2
General	4
Gold mining	1
Law	1
Military	4
Oil and gas	2
Police	1
Politics	2
Production	1
Programming	1
Rail transport	1
Sakhalin	3
Soviet	7
Space	2
Telecommunications	1