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Entrances (e.g., doors) designed to allow personnel to access x-ray processing dark rooms without permitting light into room or disturbing the film processing in other ways. These entrances may consist of a two-door system with a space in between, revolving doors, or plastic doors that allow one to see into the dark room while still protecting the film from the light. Radiographic dark room entrances are typically used in high-volume x-ray film processing departments.
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