With two different arrangements being shown in different embodiments, it will be appreciated that the throttle valve, pump and {HEAD ~ fuel metering valve} may be arranged in {TAIL ~ any number} of different arrangements in fluid series with one another 
With two different arrangements being shown in different embodiments , it will be appreciated that the throttle valve , pump and { HEAD ~ fuel metering valve } may be arranged in { TAIL ~ any number } of different arrangements in fluid series with one another
OTH OTH 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 HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH