Took to the traditional process improvement, proposed one kind in view of the tire valve cone-shape packing surface trundle processing method.

作为对传统工艺的改进，提出了一种针对气门锥形密封面的滚压加工方法。

youdao

Took to the traditional process improvement, proposed one kind in view of the tire valve cone-shape packing surface trundle processing method.

作为对传统工艺的改进，提出了一种针对气门锥形密封面的滚压加工方法。

youdao