The housing has a housing rim at {HEAD ~ a first, free edge} of {TAIL ~ the side wall} defining an opening to the cavity 
of
The housing has a housing rim at { HEAD ~ a first , free edge } of { TAIL ~ the side wall } defining an opening to the cavity
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH