Ball surface deformation Peening technology is an important means of raising ball quality.

钢球表面形变强化工艺，是提高钢球质量的一个重要手段。

youdao

Ball surface deformation Peening technology is an important means of raising ball quality.

钢球表面形变强化工艺，是提高钢球质量的一个重要手段。

youdao