The result has shown that the fracture was caused by such surface defects as fold crack in section a at connecting rod small end.
结果表明，断裂由连杆小头A截面的表面缺陷(折叠裂纹等)引起。
Decentraction of the conn-rod small end hole center with the excircle center of the conn-rod small end hole blank, which causes the hole wall of one side getting thin with the strength dropping.
连杆小头孔中心与连杆小头孔毛坯外圆中心不同心，使一边孔壁变薄，强度下降。
The connecting rod links its large end to the crankshaft and its small end to the piston.
连杆的大头与曲轴连接，小头与活塞链接。
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