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| развальцование труб; вальцовка трубок | |||
| развальцовка трубы | |||
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扩管口 : 20 phrases in 7 subjects |
| Electronics | 2 |
| General | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Oil processing plants | 2 |
| Pipelines | 2 |
| Technology | 10 |
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