8401| 20
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請問硬度50的45號鋼有辦法打孔嗎 |
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點評
鉆混凝土的沖擊鉆頭 就是典型的鑲合金鉆頭
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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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