排气管排机油
machine oil discharging from discharging duct
排气岐管背压
exhaust manifold back pressure
排气岐管隔热罩
exhaust manifold heat shield
排气岐管固定螺栓
exhaust manifold retaining bolt
排气岐管紧固组件
exhaust manifold fastener group
排气岐管口温度
exhaust manifold port temperature
排气岐管螺栓螺纹
exhaust manifold bolt thread