Upon this, {HEAD ~ electric power} is fed to {TAIL ~ the electric connector} C having the contact pins 25a and 25b charged negative and positive respectively 
Upon this , { HEAD ~ electric power } is fed to { TAIL ~ the electric connector } C having the contact pins 25a and 25b charged negative and positive respectively
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH