3637| 5
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為什么電風扇最先粘上灰塵的區域一般都是葉片邊緣呢? |
點評
差不多
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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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