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| 可变费用 | |||
| 直接费用 | |||
| direct expense: 20 phrases in 8 subjects |
| Bridge construction | 1 |
| Business | 7 |
| Chemistry | 1 |
| Economy | 3 |
| Finances | 1 |
| International trade | 1 |
| Rail transport | 1 |
| Technology | 5 |
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