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散灰 : 21 phrases in 9 subjects |
| Agriculture | 1 |
| Artificial intelligence | 1 |
| Drilling | 3 |
| Electronics | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 2 |
| Plastics | 1 |
| Refrigeration | 1 |
| Technology | 8 |
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