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减波幅 : 19 phrases in 10 subjects |
| Air defense | 1 |
| Automobiles | 1 |
| Electric machinery | 1 |
| Electronics | 3 |
| Engineering geology | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 1 |
| Radio | 1 |
| Remote sensing | 1 |
| Technology | 7 |
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