At compression stroke, discharge is generated with {HEAD ~ the electrode} of {TAIL ~ the discharge device} and the electromagnetic waves, fed from the electromagnetic wave generator through the electromagnetic wave transmission line, are radiated from the antenna 
At compression stroke , discharge is generated with { HEAD ~ the electrode } of { TAIL ~ the discharge device } and the electromagnetic waves , fed from the electromagnetic wave generator through the electromagnetic wave transmission line , are radiated from the antenna
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH