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Scientific American

July 1, 1947

1 min read

Miniature Switch, Multiple Drill Unit and more

Features Snap Action and Precision Operation

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This article was originally published with the title “Miniature Switch, Multiple Drill Unit,and more” in Scientific American Magazine Vol. 177 No. 1 (July 1947), p. 32
doi:10.1038/scientificamerican0747-32

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