Gas Eggconomizer is a visual display device which indicates {HEAD ~ the rate} of fuel consumption in {TAIL ~ an internal combustion engine} 
Gas Eggconomizer is a visual display device which indicates { HEAD ~ the rate } of fuel consumption in { TAIL ~ an internal combustion engine }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL