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| vite per legno; vite senza dado; vite lavorata dalla barra | |||
| machine screw: 10 phrases in 6 subjects |
| Chemistry | 2 |
| Materials science | 1 |
| Mechanic engineering | 4 |
| Metallurgy | 1 |
| Packaging | 1 |
| Transport | 1 |
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