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driving of key |
装键 : 48 phrases in 15 subjects |
Agriculture | 1 |
Aviation | 8 |
Electric machinery | 2 |
Electronics | 9 |
Finances | 1 |
General | 1 |
Mathematics | 3 |
Mechanics | 1 |
Metallurgy | 2 |
Nautical | 1 |
Polymers | 1 |
Rail transport | 1 |
Space | 4 |
Technology | 11 |
Telecommunications | 2 |