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單項(xiàng)選擇題

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

A.opened up
B.closed off
C.lined up
D.taken off

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單項(xiàng)選擇題

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

A.base circle
B.slope
C.bottom point
D.top point

單項(xiàng)選擇題

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

A.injection
B.penetration
C.atomization
D.compression

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