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| Leuchtschirm mit mittellangem Nachleuchten; Lumineszenzschirm mit mittellangem Nachleuchten | |||
| Nachleuchtschirm m | |||
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persistence screen : 7 phrases in 4 subjects |
| Electronics | 1 |
| Measuring instruments | 2 |
| Optics branch of physics | 2 |
| Physics | 2 |
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