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système matériel | |||
système mécanique |
механическая система: 35 phrases in 11 subjects |
Astronautics | 2 |
Aviation | 9 |
Construction | 5 |
General | 1 |
Hydraulic engineering | 1 |
Mathematics | 1 |
Mechanic engineering | 7 |
Medical | 1 |
Physics | 1 |
Technology | 3 |
Trucks/Lorries | 4 |