铅和锡是可锻的金属。

Lead and tin are malleable metals.

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实现了焊接过程中引弧、旋弧、顶锻的自动控制，操作简单方便。

The device could easily and automatically control arc ignition, arc rotation and upset.

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为了稳定和提高精铸热锻的使用寿命，研究了其失效形式和机理。

To improve and stabilize the service life of hot-forging die fabricated by cast die steer, the failure modes and mechanism were analyzed.

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