{HEAD ~ A fugitive gas pipe} supplies {TAIL ~ the fugitive gases} to the air intake and a vent allows the fugitive gases to vent to atmosphere 
supplies
{ HEAD ~ A fugitive gas pipe } supplies { TAIL ~ the fugitive gases } to the air intake and a vent allows the fugitive gases to vent to atmosphere
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH