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| distribution par rotation; distribution au tour d'arrosage | |||
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rotation system : 22 phrases in 10 subjects |
| Agriculture | 6 |
| American usage, not spelling | 1 |
| Economics | 1 |
| Forestry | 1 |
| General | 2 |
| Labor law | 2 |
| Materials science | 1 |
| Politics | 2 |
| Statistics | 2 |
| Transport | 4 |