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| δοκιμή αντοχής στην τριβή | |||
| δοκιμασία αντοχής σε τριβή | |||
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prova di abrasione : 6 phrases in 5 subjects |
| Coal | 1 |
| Industry | 2 |
| Metallurgy | 1 |
| Technology | 1 |
| Transport | 1 |
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