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| 保护制度 | |||
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protecting system : 13 phrases in 10 subjects |
| Air defense | 1 |
| Automobiles | 2 |
| Business | 1 |
| Economy | 1 |
| Electronics | 1 |
| Finances | 1 |
| Nuclear and fusion power | 2 |
| Oil processing plants | 1 |
| Securities | 2 |
| United Nations | 1 |
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