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