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。
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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