File:Philco SB100 surface barrier transistor ad=1955.jpg
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![File:Philco SB100 surface barrier transistor ad=1955.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/1/17/Philco_SB100_surface_barrier_transistor_ad%3D1955.jpg/488px-Philco_SB100_surface_barrier_transistor_ad%3D1955.jpg)
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current | 16:52, 8 April 2013 | ![]() | 1,652 × 2,028 (664 KB) | commons>Historianbuff | User created page with UploadWizard |
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