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GB-T 5249-1985 可渗透性烧结金属材料_气泡试验_孔径的测定.pdf |
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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 2007-12-5 20:08:48
