Word: eared seal
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Dates: during 1944-1944
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...plug is a joint product of Harvard and the University of California. It is made of soft vinylite plastic, fits into the outer ear with flanges both inside and out, to seal off air waves and hold it in place. It has heretofore been made exclusively for Navy gunners and Army artillerymen, but may now become a major item in speeding up plane production...