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    The sign accompanying O2H2
    burner.  It reads
     
     
 
    
    
    
     S-IVB
    Oxygen/Hydrogen Burner is located on the aft thrust structure of the
    Saturn S-IVB stage and produces approximately 20 pounds (90 N) of thrust when
    used to heat helium pressurization gas during orbital and trans-lunar coasts.
     
     
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