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beam sweep | |||
electron beam scanning | |||
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electron beam scanning system |
电子束 扫描 : 35 phrases in 10 subjects |
Air defense | 4 |
Earth sciences | 1 |
Electronics | 16 |
General | 1 |
Geology | 1 |
Oil / petroleum | 1 |
Shipbuilding | 1 |
Space | 2 |
Technology | 7 |
Thermal Energy | 1 |