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实验操作 : 27 phrases in 10 subjects |
| Aviation | 5 |
| Business | 1 |
| Drilling | 1 |
| Earth sciences | 3 |
| Electronics | 8 |
| Geology | 1 |
| Name of organization | 2 |
| Space | 3 |
| Technology | 2 |
| Telecommunications | 1 |
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