The piston pinhole in the piston also serves as a bearing for the piston pin, which is used to connect the connecting rod.
在活塞中活塞销孔也同样为活塞销形支承面，其作用为连接连杆。
The piston pinhole in the piston also serves as a bearing for the piston pin, which is used to connect the connecting rod.
在活塞中活塞销孔也同样为活塞销形支承面，其作用为连接连杆。
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