![]() |
| |||
electron stream |
电子射束 : 31 phrases in 13 subjects |
Air defense | 2 |
Construction | 1 |
Earth sciences | 1 |
Ecology | 1 |
Electronics | 11 |
Geology | 1 |
Information technology | 1 |
Oil / petroleum | 1 |
Refrigeration | 2 |
Space | 3 |
Surgery | 1 |
Technology | 5 |
Telecommunications | 1 |