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| 保证金制 | |||
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margin system : 14 phrases in 10 subjects |
| Aviation | 1 |
| Communications | 1 |
| Earth sciences | 2 |
| Electronics | 2 |
| Finances | 1 |
| Geology | 1 |
| Oil / petroleum | 2 |
| Securities | 2 |
| Space | 1 |
| Technology | 1 |
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