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working -off : 18 phrases in 11 subjects |
| Agriculture | 1 |
| Aviation | 1 |
| Business | 1 |
| Economy | 2 |
| Electronics | 1 |
| Environment | 1 |
| Information technology | 1 |
| Lighting other than cinema | 1 |
| Metallurgy | 3 |
| Oil / petroleum | 1 |
| Technology | 5 |
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