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| замыкающее кольцо; замыкающий кольцо | |||
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封 闭 环 : 19 phrases in 9 subjects |
| Computers | 1 |
| Electronics | 3 |
| Engines | 1 |
| General | 2 |
| Medical | 2 |
| Military | 1 |
| Oil and gas | 2 |
| Surveying | 1 |
| Technology | 6 |
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