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help system (ssn) |
система справочной информации : 19 phrases in 12 subjects |
Astronautics | 1 |
Computers | 1 |
Ecology | 5 |
Information technology | 1 |
Mass media | 1 |
Medical | 1 |
Military | 3 |
Oil / petroleum | 1 |
Quality control and standards | 2 |
Telecommunications | 1 |
United Nations | 1 |
Water supply | 1 |