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photo timer |
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photo timer an alarm device for use in a darkroom to advise the need to move to the next stage of the developing program. More commonly used to control x-ray exposure time automatically for spot filming or photofluorography connected with the output optical detector. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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