5446| 12
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1-2MM厚能承重200KG的板有哪些材質的? |
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點評
整體結構什么樣子,弄個草圖給大家看看,長長見識。這要求刁鉆。
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小黑屋|手機版|Archiver|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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