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水平轴 : 68 phrases in 16 subjects |
Automobiles | 6 |
Aviation | 2 |
Bridge construction | 1 |
Compressors | 1 |
Desert science | 1 |
Electronics | 2 |
General | 1 |
Geophysics | 1 |
Mechanics | 1 |
Metallurgy | 1 |
Nautical | 3 |
Space | 5 |
Technology | 32 |
Telecommunications | 1 |
Textile industry | 1 |
Wind Energy | 9 |