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