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| commutative ring | |||
| exchanger loops | |||
| 交 换 环: 34 phrases in 14 subjects |
| Air defense | 1 |
| Ecology | 1 |
| Economy | 1 |
| Electric machinery | 1 |
| Electronics | 8 |
| Gymnastics | 1 |
| Information technology | 7 |
| Metallurgy | 1 |
| Nautical | 1 |
| Plastics | 1 |
| Space | 1 |
| Technology | 5 |
| Telecommunications | 1 |
| United Nations | 4 |
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