3919| 5
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外徑180,壁厚5的錫青銅襯套壓入外套(45#)中,采用幾級配合? |
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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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