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1,056 × 481 pixel
File size: 22 KB
MIME type: image/png

The file "Peking_hardware_fig2sandclock1.png" has 1 identical duplication.

  1. Peking hardware fig2sandclock1.png . . Luwe (Talk | contribs) . . 16:57, 31 October 2017
  2. Peking hardware fig5 sandclock1.png . . Luwe (Talk | contribs) . . 17:36, 31 October 2017