The connecting rod is attached at one end to a crankpin on the crankshaft and at the other end to a piston, through a piston pin or wrist pin.
连杆的一端与曲轴的连杆轴颈相连，另一端通过活塞销与活塞相连。
2
Linking the piston by a connecting rod to a crankshaft causes the gas to rotate the shaft through half a turn.
活塞通过连杆和轴连接，使得气体带动轴旋转半圈。
3
The piston pin fits through one side of the piston, through the small end of the rod, and then through the other side of the piston. It holds the rod firmly in place in the center of the piston.