1819| 5
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今日所學(5)-不銹鋼石墨纏繞墊 |
點評
不需要很高吧?一般化工用的法蘭面貼合即可
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Archiver|手機版|小黑屋|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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