The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.<br>A:crankshaft<br>B:camshaft<br>C:piston rod<br>D:rack and pinion

The plunger in the fuel injector pump, usually operated by a （）, is driven up and down when working.
A:crankshaft
B:camshaft
C:piston rod
D:rack and pinion

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