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head section stresses
forestr.	третка (средняя клёпка донных щитов)
tech.	головка; приводная секция (конвейера)

head section: 33 phrases in 20 subjects

Aviation	2
Business	5
Construction	1
Cryptography	1
European Union	1
Finances	1
General	1
Geophysics	1
Law	1
Makarov	4
Medical appliances	2
Military	1
Mining	3
Occupational health & safety	1
Oil and gas	1
Rail transport	2
Roll stock	1
Technology	1
Telecommunications	1
Tengiz	2