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| кольцевой шов | |||
| круглый шов | |||
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| circular seam: 9 phrases in 8 subjects |
| Automated equipment | 1 |
| Biology | 1 |
| Construction | 2 |
| Electrical engineering | 1 |
| Electronics | 1 |
| Metallurgy | 1 |
| Military | 1 |
| Technology | 1 |
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