Because of the close tolerances used in diesel engine fuel oil pumps, a worn plunger requires（）
- Agrinding the spare plunger to the barrel
- Breplacing the plunger and the barrel
- Chighly polishing both the plunger and barrel
- Dreplacing plunger only
问题
Because of the close tolerances used i
参考解析：
分类：船舶电气与船舶安全题库
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