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Tiedosto:Tiny electric motor in a Z scale model locomotive.jpg

400×215× (39501 bytes) The tiny electric motor in a [[Z scale]] model locomotive. Photo: 2005 by J-E Nyström. I hereby place it in the Public Domain. English...


Tiedosto:MIT Technology Review 1925-12.djvu

This file is in DjVu, a computer file format designed primarily to store scanned documents. You may view this DjVu file here online. If the document is...