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Scientific American

December 1, 1947

1 min read

Flow Pressure Fans, Slide Projector, and more

Claimed Sturdy, Compact, And Efficient

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This article was originally published with the title “Flow Pressure Fans, Slide Projector, and more” in Scientific American Magazine Vol. 177 No. 6 (December 1947), p. 270
doi:10.1038/scientificamerican1247-270

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