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