In turn, this movement of {HEAD ~ the floor pan} allows {TAIL ~ the seat} to move in the same direction as the vehicle roof maintaining the distance between roof and seat 
In turn , this movement of { HEAD ~ the floor pan } allows { TAIL ~ the seat } to move in the same direction as the vehicle roof maintaining the distance between roof and seat
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH