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不銹鋼303細長軸訂單成本控制在0.8元以內 |
點評
材料費用不超過30%
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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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