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| αντίσταση κοπής; κύρια αντίσταση κοπής; πίεση του οξυγόνου κοπής; πίεση κοπής; κύρια πίεση κοπής | |||
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pression de coupe : 7 phrases in 1 subject |
| Metallurgy | 7 |
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