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| 中心荷载 | |||
| center load: 29 phrases in 11 subjects |
| Agriculture | 1 |
| Automobiles | 2 |
| Aviation | 1 |
| Electric machinery | 2 |
| Electronics | 4 |
| Engineering geology | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 2 |
| Rail transport | 2 |
| Technology | 11 |
| Wind Energy | 1 |
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