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| FO | |||
| fiberoptics; fibreoptics | |||
| fibre optics (optical science concerned with the research, development, and manufacture of thin cylindrical glass fibres of high optical quality) | |||
| fiber optics; fibre optics | |||
| Faseroptik: 18 phrases in 2 subjects |
| Industry | 6 |
| Optics branch of physics | 12 |