When the universal gasoline engine is running, {HEAD ~ fuel level} in {TAIL ~ the fuel tank} gradually drops and air in the atmosphere is able to enter the fuel tank in the direction opposite to the route of gasoline volatilization, and the incoming air is capable of conveying into the tank a portion of the volatilized gasoline already adsorbed on the fine carbon particles 
in
When the universal gasoline engine is running , { HEAD ~ fuel level } in { TAIL ~ the fuel tank } gradually drops and air in the atmosphere is able to enter the fuel tank in the direction opposite to the route of gasoline volatilization , and the incoming air is capable of conveying into the tank a portion of the volatilized gasoline already adsorbed on the fine carbon particles
OTH OTH OTH OTH OTH OTH OTH OTH 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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH