This was the 'shock machine'.

这就是“电击器”。

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A new method of shock and rolling is introduced for surface-strengthening of machine part.

介绍一种用于零件表面强化的新方法—冲击滚压。

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A new method of shock and rolling is introduced for surface-strengthening of machine part.

介绍一种用于零件表面强化的新方法—冲击滚压。

youdao