{HEAD ~ The system} 13, wherein {TAIL ~ said workpiece receiving device} or said workpiece is not movable towards or from said at least one of said openings 
wherein
{ HEAD ~ The system } 13 , wherein { TAIL ~ said workpiece receiving device } or said workpiece is not movable towards or from said at least one of said openings
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH