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| إضاءة فى إتجاه معين عند نقطة معينة لسطح حقيقى أوتخيلى | |||
| إشعاعية | |||
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| نصوع من المصدر في إتجاه واحد | |||
| luminancia: 29 phrases in 6 subjects |
| Lighting other than cinema | 11 |
| Radio | 11 |
| Remote sensing | 1 |
| Telegraphy | 3 |
| Vacuum tubes | 2 |
| Video recording | 1 |
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