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非 离子活性剂 : 31 phrases in 9 subjects |
| Agriculture | 2 |
| Chemistry | 5 |
| Drilling | 1 |
| Earth sciences | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| General | 3 |
| Oil / petroleum | 14 |
| Technology | 3 |
| Water resources | 1 |
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