Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）<br>A:grinding the spare plunger to the barrel<br>B:replacing the plunger and the barrel<br>C:highly polishing both the plunger and barrel<br>D:replacing plunger only

Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）
A:grinding the spare plunger to the barrel
B:replacing the plunger and the barrel
C:highly polishing both the plunger and barrel
D:replacing plunger only

出自：海船船员证

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