In {HEAD ~ the case} of {TAIL ~ trapping}, the movement of the rear pane in the lowering direction is stopped and the rear pane is moved in the lifting direction  
of
In { HEAD ~ the case } of { TAIL ~ trapping } , the movement of the rear pane in the lowering direction is stopped and the rear pane is moved in the lifting direction
OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH