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| kilo X-unit | |||
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| kilo-X unit (X 射线波长单位，等于10-10米) | |||
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| KX unit | |||
| 千 X 单位: 37 phrases in 12 subjects |
| Aviation | 2 |
| Earth sciences | 7 |
| Electronics | 3 |
| General | 5 |
| Hydroelectric power stations | 2 |
| Metallurgy | 2 |
| Oil processing plants | 7 |
| Securities | 1 |
| Space | 4 |
| Technology | 2 |
| Telecommunications | 1 |
| United Nations | 1 |