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腐 蚀斑 : 21 phrases in 9 subjects |
| Automobiles | 2 |
| Dentistry | 1 |
| Drilling | 2 |
| Electronics | 3 |
| General | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 2 |
| Shipbuilding | 2 |
| Technology | 5 |
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