The gimbal mechanism provides a tight fit between {TAIL ~ the door} and the housing when {HEAD ~ the door} is in the closed position 
The gimbal mechanism provides a tight fit between { TAIL ~ the door } and the housing when { HEAD ~ the door } is in the closed position
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH