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| βαλβίδα απελευθέρωσης; βαλβίδα ανακουφιστική; βαλβίδα παροχής | |||
| βαλβίδα καθαρισμού | |||
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release valve : 15 phrases in 4 subjects |
| Astronautics | 1 |
| Coal | 2 |
| Earth sciences | 1 |
| Transport | 11 |
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