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腐蚀孔 : 15 phrases in 8 subjects |
| Electronics | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 3 |
| Packaging | 1 |
| Space | 1 |
| Technology | 5 |
| Textile industry | 1 |
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