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| внутреннее кольцевое пространство (The "A" annulus is the void between the production tubing and the smallest casing string. (wiki) Alexander Demidov) | |||
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A annulus : 7 phrases, 4 sujets |
| Appareils médicaux | 2 |
| Général | 2 |
| Ingénierie électrique | 1 |
| Makarov | 2 |