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| тяжёлый рельс; тяжёлая железная дорога | |||
| 重铁: 50 phrases in 11 subjects |
| Drilling | 5 |
| Electronics | 9 |
| General | 17 |
| Geology | 2 |
| GOST | 1 |
| Military | 1 |
| Mineralogy | 1 |
| Mining | 1 |
| Oil processing plants | 1 |
| Technology | 11 |
| United Nations | 1 |
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