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结 构参数 : 20 phrases in 8 subjects |
| Computer networks | 1 |
| Earth sciences | 1 |
| Ecology | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 2 |
| Refrigeration | 1 |
| Technology | 11 |
| Telecommunications | 2 |
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