Flash impetus and adopting projection anulus controlling upsetting, steady speed flash and quality of butt welding point is well.
闪光推进和顶锻采用凸轮控制，闪光速度平稳对接焊口质量好。
Flash impetus and adopting projection anulus controlling upsetting, steady speed flash and quality of butt welding point is well.
闪光推进和顶锻采用凸轮控制，闪光速度平稳对接焊口质量好。
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