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材料系统 : 93 phrases in 13 subjects |
| Aviation | 47 |
| Business | 1 |
| Earth sciences | 1 |
| Economy | 2 |
| Electronics | 23 |
| General | 3 |
| Mechanics | 2 |
| Metallurgy | 1 |
| Nautical | 1 |
| Polymers | 1 |
| Space | 5 |
| Technology | 5 |
| Textile industry | 1 |
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