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| ringfoermig; toroidal; torusfoermig | |||
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Toroidale : 50 phrases in 10 subjects |
| Antennas and waveguides | 2 |
| Earth sciences | 10 |
| Electronics | 10 |
| General | 6 |
| Mechanic engineering | 3 |
| Metallurgy | 2 |
| Natural sciences | 1 |
| Nuclear and fusion power | 6 |
| Physical sciences | 8 |
| Transport | 2 |