某兴趣小组在实验室中模拟炼铁化学原理的实验对固体产物成分等进行探究设计实验用一氧化碳还原纯净的氧化铁粉末实验装置如下图进行实验 Template




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sketch #3260 sorry to over comment on your blog .haha. I 'm just flnpiipg through your posts after finding you through the KCWC. Recently I had this huge urge to learn to sketch with black ink pens. This cloud drawing is exactly the thing that I feel the need to put on paper. : )


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tomski某兴趣小组在实验室中模拟炼铁化学原理的实验对固体产物成分等进行探究设计实验用一氧化碳还原纯净的氧化铁粉末实验装置如下图进行实验 coloring