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| sheath-core fiber; skin-core fiber; step-index fiber | |||
| волокно с сердечником: 32 phrases in 8 subjects |
| Cables and cable production | 6 |
| Electronics | 4 |
| Mass media | 15 |
| Military | 1 |
| Optics branch of physics | 1 |
| Quantum electronics | 2 |
| Technology | 2 |
| Telecommunications | 1 |