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| piirtokierukka | |||
| kierreviiva; ruuviviiva | |||
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helix : 24 phrases in 10 subjects |
| Chemistry | 1 |
| Earth sciences | 1 |
| Economy | 1 |
| Electronics | 8 |
| Industry | 1 |
| Life sciences | 1 |
| Mechanic engineering | 8 |
| Medical | 1 |
| Metallurgy | 1 |
| Transport | 1 |
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