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double track |
双迹 : 119 phrases in 12 subjects |
Air defense | 1 |
Desert science | 1 |
Earth sciences | 1 |
Electronics | 1 |
General | 4 |
Metallurgy | 1 |
Nuclear and fusion power | 1 |
Oil / petroleum | 5 |
Space | 1 |
Technology | 7 |
Telecommunications | 3 |
Textile industry | 93 |