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OHC顶上凸轮轴式 OHV 顶上汽门式 Oil consumption 机油的消耗 Oil-control ring 油环 Oil cooler 机油冷却器 Oil dilution 机油的冲淡 Oil filter 机油滤清器 Oil gallery 主机油 Oil hole 油孔 Oil level gauge 量油尺 Oil pan 油底壳 Oil pan drain plug 油底壳放油塞 Oil pan drain plug gasket 油底壳放油塞垫片 Oil pan gastet 油底壳垫片 Oil pan screw 油底壳螺丝 Oil pan timing case cover seal 油底壳与正时齿轮盖油封 Oil passage 机油道 Oil pressure relief valve 机油压力释放阀 Oil pressure switch 机油压力开关 Oil pressure warning light 机油压力警示灯 Oil pump 机油泵 Oil pump drive gear 机油泵驱动齿轮 Oil-returning slot 回油槽 One Way clutch 单向离合器 Orifice 限孔 O-ring O型环 Opening 开口 Operating-data sensing system 引擎运转状况感知系统 Operating temperature 工作温度 | 
