At last, the technology of rolling two taper rings in one process was developed successfully.

  • 经过反复试验验证, 有效控制了拉凹和宽展,试验取得了成功,成功开发出了锥形套圈的冷辗扩工艺.

  • 网络文摘精选 2025-01-19 21:53:16

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