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peitetoimina suoritettava tarkkailu | |||
tarkkailu | |||
havainnointi |
observatie : 19 phrases in 11 subjects |
Astronautics | 1 |
Communications | 3 |
Criminal law | 2 |
Earth sciences | 1 |
Electronics | 4 |
General | 1 |
Law | 2 |
Life sciences | 1 |
Natural sciences | 1 |
Statistics | 2 |
Technology | 1 |