油箱里油少的时候,里面充满了空气。加油的时候,汽油越来越多,空气被排挤出来。油枪伸进油箱的部分里面有一小管,从枪口处一直到油枪上的“触发器”上。随着往油箱加油的时候,油箱里的部分空气会进入到小管里,到了某一时刻,汽油会没过小管的入口,这样小管就没 When the fuel tank less oil, which is full of air. Come on, gas more and more, the air is squeezed out. There is a small tube in the part of the gun extending into the tank, from the muzzle to the “trigger” on the gun. As the tank is refueled, some of the air in the tank will enter the small tube, and at some point, the gasoline will not pass through the small tube so that the small tube will not