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washer packing : 15 phrases in 10 subjects |
| Automobiles | 2 |
| Bridge construction | 1 |
| Computer numerical control | 1 |
| Drilling | 2 |
| Metallurgy | 3 |
| Nautical | 1 |
| Oil / petroleum | 1 |
| Space | 2 |
| Technology | 1 |
| Wind Energy | 1 |
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