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求<通風機振動精度>JB/TQ334-87和《振動烈度分級》ISO-2372 |
小黑屋|手機版|Archiver|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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發表于 2009-9-8 10:59:54