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| isocandela diagram | |||
| isocandela diagram (семейство кривых равной силы света (изокандел)) | |||
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| isocandela diagram (ряд изокандел) | |||
| isocandle diagram | |||
| диаграмма равных сил света: 1 phrase in 1 subject |
| Metrology | 1 |
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