7037| 15
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加工木材的刀具用什么鋼做比較好,,硬度是多少,,需要些什么熱處理 |
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小黑屋|手機(jī)版|Archiver|機(jī)械社區(qū) ( 京ICP備10217105號(hào)-1,,京ICP證050210號(hào),,浙公網(wǎng)安備33038202004372號(hào) )
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