File:1970's Czechoslovka TESLA automatic telephone exchange.jpg

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English: Top end of an early 1970's TESLA crossbar telephone exchange produced in Czechoslovakia
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Author Fanfardon

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current01:13, 10 February 2011Thumbnail for version as of 01:13, 10 February 20113,072 × 2,304 (2.95 MB)Fanfardon (talk | contribs){{Information |Description ={{en|1=Top end of an early 1970's TESLA telephone exchange produced in Czechoslovakia}} |Source ={{own}} |Author =Fanfardon |Date =2009-12-20 |Permission = |other_versions = }

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