{HEAD ~ This predetermined angle} may assist in forcing the movable window panel closer to {TAIL ~ a fixed window panel} when the window opening is closed 
{ HEAD ~ This predetermined angle } may assist in forcing the movable window panel closer to { TAIL ~ a fixed window panel } when the window opening is closed
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH