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| 保守 (hoshu); 維持 (いぢ); メインテナンス (meintenansu); 整備 (せいび); 手入れ (ていれ); 取扱い (toriatsukai) | |||
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техническая эксплуатация : 4 phrases in 1 subject |
| Astronautics | 4 |
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