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Old 1st June 2006 | 15:08
  #9 (permalink)  
allthatglitters
 
Joined: Oct 2001
Posts: 263
Likes: 1
From: farrrr east
Be careful, some aircraft have 3 panes, outer, middle and inner, the inner being an accoustic or scratch pane. The middle and outer being the pressure panes, with the mid pane having the vent hole.
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