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| 规格说明系统 | |||
| specification system: 67 phrases in 11 subjects |
| Aviation | 30 |
| Business | 3 |
| Commerce | 1 |
| Communications | 2 |
| Electronics | 12 |
| Environment | 1 |
| Information technology | 4 |
| Space | 6 |
| Technology | 4 |
| Telecommunications | 3 |
| Textile industry | 1 |
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