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【视频】制造工艺
3. 冲压（汽车制造）
https://m.shsbnu.net/pluginfile.php/35065/mod_folder/content/0/%E5%8A%A0%E5%B7%A5%E5%B7%A5%E8%89%BA-%E5%86%B2%E5%8E%8B-How%20Its%20Made%20%20%20Car%20Door%20By%20Discovery%20Science%20Channel%20Hindi.mp4
原标题：How Its Made Car Door By Discovery Science Channel Hindi