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| lottery of lotteries | |||
| lottery of lotteries (一种抽签方法) | |||
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| lottery of lotteries | |||
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环抽 : 34 phrases in 10 subjects |
| Aviation | 2 |
| Construction | 1 |
| Electronics | 3 |
| Engineering geology | 1 |
| Metallurgy | 11 |
| Mining | 1 |
| Oil / petroleum | 4 |
| Space | 2 |
| Technology | 8 |
| Textile industry | 1 |
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