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 Create two copies  of  the line and hide it. 
 
Right click on the line and choose convert to nurbs. 
 
  
Use the nurb command �Create 2-Rail sweep�, select the edge of the line, first the left one(1)after the right one(2), and now the upper one(3)and the lower one(4). 
Unhide one line and blips �renderable� and �display render mesh�, use 5 sides for object. 
 
    
Unhide the other line, choose sub object mode spline, go to �outline� and create an offset line. Now extrude and go to edit mesh and move the faces as in the image(33), repeat the outline command for the band of the goggle.(34) 
 
    
    
 
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