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焊裂缝 : 47 phrases in 12 subjects |
| Automobiles | 2 |
| Business | 1 |
| Chemistry | 1 |
| Compressors | 2 |
| Drilling | 1 |
| Electronics | 2 |
| Metallurgy | 16 |
| Oil / petroleum | 3 |
| Plastics | 1 |
| Shipbuilding | 1 |
| Technology | 15 |
| Wind Energy | 2 |
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