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качество бетона : 40 phrases in 9 subjects |
| Abbreviation | 2 |
| Bridge construction | 1 |
| Cement | 3 |
| Construction | 27 |
| Geology | 1 |
| Makarov | 3 |
| Military | 1 |
| Road works | 1 |
| Seismology | 1 |
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