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梯形物 : 19 phrases in 8 subjects |
| Architecture | 2 |
| Chemistry | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Oil / petroleum | 1 |
| Plastics | 3 |
| Polymers | 5 |
| Technology | 3 |
| Textile industry | 2 |
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