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