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| rectangulaire; orthogonal | |||
| right-angled: 14 phrases in 8 subjects |
| Astronomy | 1 |
| Construction | 4 |
| Earth sciences | 1 |
| Electric traction | 1 |
| General | 3 |
| Materials science | 2 |
| Metallurgy | 1 |
| Scientific | 1 |
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