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加工42crmo 硬度35hrc 螺紋10-32unf 多瑪絲錐首件斷刀的改進(jìn)方法 |
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點(diǎn)評(píng)
如果參數(shù)都一樣,,應(yīng)該出個(gè)什么標(biāo)準(zhǔn)的吧,,為何每個(gè)品牌的絲錐都會(huì)有自己的推薦值
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