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engineering structure : 27 phrases in 14 subjects |
Architecture | 1 | Energy industry | 2 | Programming | 2 |
Aviation | 1 | General | 3 | Seismology | 1 |
Celestial mechanics | 1 | Makarov | 5 | Technology | 1 |
Construction | 4 | Mining | 2 | Weapons of mass destruction | 1 |
Electronics | 1 | Nuclear and fusion power | 2 |