Comparison of end hole catheters with side hole catheters.
比较端孔导管与侧孔导管。
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。
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