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有效比 重 : 11 phrases in 8 subjects |
| Automobiles | 1 |
| Aviation | 1 |
| Business | 1 |
| Commerce | 1 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Scientific | 1 |
| Technology | 4 |
| Textile industry | 1 |
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