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rekken |
estante : 20 phrases in 11 subjects |
Agriculture | 5 |
Antennas and waveguides | 1 |
Chemistry | 4 |
Communications | 3 |
Earth sciences | 1 |
Electronics | 1 |
General | 1 |
Materials science | 1 |
Mechanic engineering | 1 |
Municipal planning | 1 |
Natural sciences | 1 |