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       Michael A. Stecker 
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      ![]() Vertical RainVent Batten by DuPont at southwest (rear) of house on December 13, 2017 .  | 
    
      
      ![]() Close-up view of DuPont RainVent Batten on December 13, 2017 .  | 
    
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      ![]() December 14, 2017 .  | 
    
      
      ![]() Grinding stone on December 15, 2017  | 
    
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