piston pin bushing oil hole 活塞销衬套油孔
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It proposes measures of improving piston structure design and adopts the structure of cast aluminum bronze embedded in the hole in the piston pin bushing.
据此提出了活塞结构改进设计措施,采用了在活塞销孔内嵌入铸铝青铜衬套结构。
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