5821| 10
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橡膠密封墊硬度選多大? |
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點評
別瞎說,橡膠硬度與橡膠種類基本無關,都可以加炭黑等調節
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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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