{HEAD ~ a cover trim member} for {TAIL ~ engagement} with the housing for enclosing the cavity when the cover trim member is engaged with the perimeter of the concave surface to the housing, 
for
{ HEAD ~ a cover trim member } for { TAIL ~ engagement } with the housing for enclosing the cavity when the cover trim member is engaged with the perimeter of the concave surface to the housing ,
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH