一家德国公司

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Rock Tech Lithium 公司在德国建设一个 新工厂。

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这是欧洲第一个生产电池材料 的工厂。

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这家公司想帮助做电动汽车。

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这对那里的经济很重要。

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Rock Tech 和一家中国公司合作。

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他们一 起工作，想让工厂变得更好。

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很多中国客人去了德国。

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他们来自四川 和成都。

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成都做了很多电池。

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