File:AirMotionTransformer.png
AirMotionTransformer.png (506 × 361 pixels, file size: 15 KB, MIME type: image/png)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:35, 25 August 2011 | 506 × 361 (15 KB) | Rics1299 | {{Information |Description={{en|Air-motion transformer sketch, from Heil's US patent 3636278, 1972. That makes it PD, but I couldn't spot an appropriate tag for a patent drawing so I used the US gov tag.}} |Source=Transferred from [http://en.wikipedia.or |
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