The s shaped movement of the rear pane 3 means that {TAIL ~ the gap} 16 tapers in the z lifting direction in such a way that it is not possible to free the object 18 by {HEAD ~ movement} in a direction in the xz plane 
The s shaped movement of the rear pane 3 means that { TAIL ~ the gap } 16 tapers in the z lifting direction in such a way that it is not possible to free the object 18 by { HEAD ~ movement } in a direction in the xz plane
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL 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 HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH