单项选择题 As the plunger moves upwards in the barrel, injection will commence once the plunger has （） the spill ports and the pressure builds up.

单项选择题 It is important to note that the injection only takes place when the plunger is moving up the cam （）.

单项选择题 The high-pressure fuel opens the fuel valve and is sprayed into the cylinder in tiny droplets known as （）.