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套槽 : 31 phrases in 9 subjects |
| Automobiles | 1 |
| Drilling | 1 |
| Electronics | 1 |
| General | 2 |
| Metallurgy | 4 |
| Oil / petroleum | 1 |
| Plastics | 3 |
| Refrigeration | 1 |
| Technology | 17 |
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