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electron image : 47 phrases in 12 subjects |
Aviation | 1 |
Earth sciences | 3 |
Electronics | 12 |
General | 1 |
Geology | 1 |
Metallurgy | 5 |
Oil / petroleum | 2 |
Optics branch of physics | 1 |
Shipbuilding | 1 |
Space | 1 |
Technology | 17 |
Telecommunications | 2 |