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d.r : 27 phrases in 15 subjects |
Coal | 1 |
Communications | 1 |
Finances | 1 |
General | 6 |
Law | 4 |
Marketing | 1 |
Materials science | 1 |
Meteorology | 1 |
Natural sciences | 1 |
Patents | 1 |
Radio | 1 |
Research and development | 4 |
Social science | 1 |
Taxes | 2 |
United Nations | 1 |