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| 互换原理; 可逆原理 | |||
| 可逆性原理; 互易原理 | |||
| 互惠原则 | |||
| reciprocity principle: 9 phrases in 6 subjects |
| China | 1 |
| International trade | 1 |
| Law | 1 |
| Space | 1 |
| Technology | 3 |
| Textile industry | 2 |
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