{TAIL ~ The cover} has a longitudinal extended V shaped {HEAD ~ protuberance} along a face of the cover which engages the base member 
{ TAIL ~ The cover } has a longitudinal extended V shaped { HEAD ~ protuberance } along a face of the cover which engages the base member
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH