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读数点 : 18 phrases in 11 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Compressors | 1 |
| Construction | 2 |
| Drilling | 1 |
| Electronics | 1 |
| General | 2 |
| Hydroelectric power stations | 2 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Technology | 3 |
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