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control area : 48 phrases in 14 subjects |
Agriculture | 4 |
Aviation | 2 |
Communications | 4 |
Earth sciences | 1 |
Electronics | 1 |
Environment | 7 |
Forestry | 2 |
General | 2 |
Life sciences | 2 |
Microsoft | 1 |
Nuclear and fusion power | 1 |
Radio | 1 |
Semiconductors | 1 |
Transport | 19 |