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