{HEAD ~ The HHP} 140 also provides for {TAIL ~ system wiring testing} and other troubleshooting functions 
provides for
{ HEAD ~ The HHP } 140 also provides for { TAIL ~ system wiring testing } and other troubleshooting functions
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH