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waste energy : 21 phrases in 13 subjects |
| Automobiles | 1 |
| China | 1 |
| Earth sciences | 3 |
| Ecology | 1 |
| Economy | 1 |
| Electronics | 1 |
| Engineering geology | 1 |
| Environment | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Mechanics | 1 |
| Metallurgy | 2 |
| Space | 1 |
| Technology | 6 |
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