{HEAD ~ The housing} may have {TAIL ~ an interior} in or through which the point of contact surface may be accessed and an anterior opening for access to the interior 
have
{ HEAD ~ The housing } may have { TAIL ~ an interior } in or through which the point of contact surface may be accessed and an anterior opening for access to the interior
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL 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