| 摘要 |
Apparatus comprising a chamber for receiving a film cartridge, a rotatable driver engageable coaxially with rotatable film moving means in a housing of the film cartridge for rotating the film moving means to advance a filmstrip from the housing when the film cartridge is received in the chamber, and locking means for preventing rotation of the driver, is characterized in that the driver is engageable with the locking means to prevent rotation of the driver only when the film cartridge is removed from the chamber.
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