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什么材料可以既可以耐熱,又輕,,又不容易摔碎,,又絕緣? |
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小黑屋|手機版|Archiver|機械社區(qū) ( 京ICP備10217105號-1,京ICP證050210號,,浙公網(wǎng)安備33038202004372號 )
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