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螺 钉 脚 : 20 phrases in 10 subjects |
| Architecture | 1 |
| Automobiles | 1 |
| Chemistry | 2 |
| Computer numerical control | 1 |
| Engineering geology | 1 |
| Life sciences | 1 |
| Metallurgy | 1 |
| Space | 1 |
| Technology | 10 |
| Textile industry | 1 |
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