1216| 4
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各位大哥,8的鍵許用擠壓應力是多少Mpa? |
點評
書上有的,你居然還來問
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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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