As a result {HEAD ~ maintenance} for {TAIL ~ the power source cable} is improved, and production costs lowered 
for
As a result { HEAD ~ maintenance } for { TAIL ~ the power source cable } is improved , and production costs lowered
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH