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strumień świetlny | |||
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strumień świetlny promieniowany przez źródło |
luminous: 60 phrases in 10 subjects |
Analytical chemistry | 2 |
Chemistry | 4 |
Construction | 19 |
Lighting other than cinema | 23 |
Medical | 1 |
Photography | 1 |
Physical sciences | 1 |
Radio | 2 |
Transport | 3 |
Vacuum tubes | 4 |