4882| 12
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请问大家这是什么材料 |
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点评
高耐磨,低摩擦系数,高抗冲击性能,耐腐蚀,耐疲劳。
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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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