| 摘要 |
337,472. Selenophon Licht-und Tonbildges. March 27, 1929, [Convention date]. Light-sensitive cells. - In order that the sensitized surface 5 of a selenium cell 6 of the condenser type may be arranged at a distance not greater than 5 mm. from the point of reflection 4 of a sound record 3, the cell is mounted in a wedge-shaped carrier.
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