8494| 10
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設備電器元件安裝板都用什么材料? |
點評
正解。因為可以良好地接地。
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Archiver|手機版|小黑屋|機械社區 ( 京ICP備10217105號-1,京ICP證050210號,浙公網安備33038202004372號 )
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