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