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signal de numérotation |
pulsing : 84 phrases in 11 subjects |
Agriculture | 5 |
Communications | 17 |
Computers | 1 |
Earth sciences | 2 |
Electronics | 19 |
Information technology | 26 |
Law | 5 |
Medical | 1 |
Physical sciences | 1 |
Telecommunications | 3 |
Transport | 4 |