The information obtained from the flow meter 220 can be used to determine general operating characteristics and to determine {HEAD ~ the fraction} of fuel used by the engine which originates with {TAIL ~ the fugitive gases} 
The information obtained from the flow meter 220 can be used to determine general operating characteristics and to determine { HEAD ~ the fraction } of fuel used by the engine which originates with { TAIL ~ the fugitive gases }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL