electronic means suitable for causing the spark in the spark plug in each cylinder {HEAD ~ whose piston} is located near {TAIL ~ a top dead centre} as identified by a sensor placed on a crank shaft 
is located near
electronic means suitable for causing the spark in the spark plug in each cylinder { HEAD ~ whose piston } is located near { TAIL ~ a top dead centre } as identified by a sensor placed on a crank shaft
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH