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усовершенствование nstresses
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
: 132 phrases in 15 subjects
Aviation2
Business3
Economy1
Education19
Foreign trade1
General70
Historical4
Medical2
Military8
Name of organization1
Oil processing plants2
Patents2
Rail transport2
Research and development1
Technology14