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急求组合机床扩孔，锪孔 切削力、转矩及功率公式 |
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小黑屋|手机版|Archiver|机械社区 ( 京ICP备10217105号-1，京ICP证050210号，浙公网安备33038202004372号 )
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发表于 2009-5-22 14:32:26
