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Word: embossing (lookup in dictionary) (lookup stats)
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Usage:

...might have many advantages over records made of wax disks or cylinders. But how to press a sound track on film with a needle, without cutting through the film? Fonda finally solved that problem with a "yieldable bed" of felt under the film, which would permit the needle to emboss a groove in the film without cutting through...

Author: /time Magazine | Title: Science: Sound on Cellophane | 12/20/1943 | See Source »

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