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苏州地区哪有好的铝棒生产厂家? |
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点评
铝棒硬度要HRB50到60度, 这是唯一特殊要求
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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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