4587| 7
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碳的同素異構體或碳基材料會取代金屬嗎? |
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點評
大蝦玩一次實際東西,玩完,大家再下結論,碳結構,成本是鋼鐵的數十倍甚至上百倍,其流程長,焦油本身就是高污染物品,碳材料,成型一次數小時甚至數天,能耗巨大,米國太空梭,戰斗機結構,非常昂貴,
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