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усовершенствование
n
stresses
gen.
升级
;
技术革新
;
现代化建设
ed.
进修
;
深造
O&G
完善
oil.proc.
改良
tech.
改进
;
改善
усовершенствование
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132 phrases
in 15 subjects
Aviation
2
Business
3
Economy
1
Education
19
Foreign trade
1
General
70
Historical
4
Medical
2
Military
8
Name of organization
1
Oil processing plants
2
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2
Rail transport
2
Research and development
1
Technology
14
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