It is also possible for the circulation to occur only if or as long as the on board electrical system of {TAIL ~ the vehicle} of {HEAD ~ the internal combustion engine} has sufficient energy reserves to start the engine again 
It is also possible for the circulation to occur only if or as long as the on board electrical system of { TAIL ~ the vehicle } of { HEAD ~ the internal combustion engine } has sufficient energy reserves to start the engine again
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH