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冲 击臂 : 22 phrases in 9 subjects |
| Architecture | 1 |
| Automobiles | 2 |
| Electric machinery | 1 |
| Oil / petroleum | 1 |
| Plastics | 5 |
| Polymers | 4 |
| Space | 3 |
| Steel production | 1 |
| Technology | 4 |
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