10086| 19
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想找一種材料能取代電木輪,要絕緣耐磨 |
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點(diǎn)評(píng)
似乎一般來(lái)說(shuō),硬度越高,耐磨性越好
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點(diǎn)評(píng)
不錯(cuò),好想法
評(píng)分
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