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== 外部连线 ==
== 外部连线 ==
* [https://web.archive.org/web/20150106211900/http://www.stahlseite.de/ 炼钢厂相集Stahlseite] Extensive picture gallery about all methods of making and shaping of iron and steel in North America and Europe. In German and English.
* [http://www.stahlseite.de/ 炼钢厂相集Stahlseite] Extensive picture gallery about all methods of making and shaping of iron and steel in North America and Europe. In German and English.


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