key or 6 key square serration axle is the traditional structure of starter armature shaft for auto and tractor and has been replaced by cold rolling multi key involuting serration axle.
英
美
释义
铣削加工的四键或六键矩形花键是汽车、拖拉机用起动机电枢轴上的传统结构,已逐渐被用冷滚轧加工的多键渐开线螺旋花键所代替。
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