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  4. [reduction of Fe3O4 by hydrogen to produce ignition iron]

[reduction of Fe3O4 by hydrogen to produce ignition iron]

Date:2021-08-22,View:397,
https://m.baidu.com/video/page?pd=video_page&nid=8840989222114159817&sign=&word=%E6%B0%A2%E8%BF%98%E5%8E%9F%E9%93%81&oword=%E6%B0%A2%E8%BF%98%E5%8E%9F%E9%93%81&atn=index&frsrcid=4185&ext=%7B%22jsy%22%3A1%7D&top=%7B%22sfhs%22%3A1%2C%22_hold%22%3A2%7D

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