{HEAD ~ The housing} may have holes to accommodate a pad that seats against {TAIL ~ the individual sensing lines} 
{ HEAD ~ The housing } may have holes to accommodate a pad that seats against { TAIL ~ the individual sensing lines }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL