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伸缩筒 : 38 phrases in 9 subjects |
| Agriculture | 1 |
| Automobiles | 2 |
| Electronics | 2 |
| General | 1 |
| Hydroelectric power stations | 1 |
| Nuclear and fusion power | 1 |
| Plastics | 5 |
| Technology | 23 |
| Textile industry | 2 |
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