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bare-midriff style |
中空式: 47 phrases in 14 subjects |
Air defense | 1 |
Automobiles | 3 |
Aviation | 11 |
Earth sciences | 1 |
Electronics | 1 |
General | 1 |
Nautical | 2 |
Rail transport | 1 |
Refrigeration | 3 |
Space | 3 |
Surgery | 1 |
Technology | 12 |
Textile industry | 2 |
Water resources | 5 |