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| 成螺旋形地; 呈螺线形地 | |||
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spirally : 32 phrases in 9 subjects |
| Bridge construction | 1 |
| Chemistry | 1 |
| Construction | 1 |
| Dragon dance | 1 |
| Electronics | 3 |
| Metallurgy | 6 |
| Oil / petroleum | 4 |
| Technology | 14 |
| Textile industry | 1 |
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