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beam tube |
束射管 : 50 phrases in 15 subjects |
Agriculture | 1 |
Air defense | 2 |
Anatomy | 1 |
Construction | 1 |
Desert science | 1 |
Electronics | 15 |
General | 2 |
Geophysics | 2 |
Information technology | 1 |
Metallurgy | 4 |
Oil / petroleum | 1 |
Radio | 3 |
Space | 4 |
Technology | 11 |
Telecommunications | 1 |