6258| 20
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鉆孔方面機床問題的求助 |
點評
細孔放電機,加工這樣的孔,單孔加工成本1.5元
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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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