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Frans Michel Penning ?

  1. Mar 16, 2008 #1
    Frans Michel Penning ??

    Hello:smile:
    can you help me , please?:redface:
    Frans Michel Penning is create trap technique
    why??:confused:
     
  2. jcsd
  3. Mar 16, 2008 #2

    Doc Al

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    Staff: Mentor

    http://en.wikipedia.org/wiki/Penning_trap" [Broken]
     
    Last edited by a moderator: May 3, 2017
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