楼主: 海底蛟龙88
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直径12毫米,深度25毫米通孔,内壁要做到光洁度0.5左右 |
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小黑屋|手机版|Archiver|机械必威体育网址 ( 京ICP备10217105号-1,京ICP证050210号,浙公网安备33038202004372号 )
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