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welding upset : 20 phrases in 9 subjects |
| Automobiles | 1 |
| Chemistry | 1 |
| Construction | 1 |
| General | 1 |
| Metallurgy | 6 |
| Oil / petroleum | 2 |
| Plastics | 2 |
| Rail transport | 2 |
| Technology | 4 |
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