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| 试验实验工作; 试制品 | |||
| 试车; 试验工作; 检验工作 | |||
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test work : 19 phrases in 7 subjects |
| Aviation | 8 |
| Chemistry | 1 |
| Economy | 1 |
| Electronics | 2 |
| Metallurgy | 2 |
| Sports | 2 |
| Technology | 3 |
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