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