其实每个缸入汽汽门连杆边上都有大量烧黑的机油,有一个缸确實特别明显四个出入汽门全黑,且内面也有湿机油,
其实每个缸入汽汽门连杆边上都有大量烧黑的机油,有一个缸确實特别明显四个出入汽门全黑,且内面也有湿机油,
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