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User:JimD - Wikipedia, the free encyclopedia |
 | | A Fleissner Grill or Grille du Colonel Fleissner is a term taken from the history of cryptography. |
 | | Austrian colonel Fleissner improved this process by using a grid of 36 boxes (6 lines, 6 columns) and bored new holes. |
 | | The grid of colonel Fleissner can be varied with l'infini. |
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