6409| 25
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尋常見的耐磨、易加工材料 |
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點評
Mn13試過了,效果一般。前兩天找模具廠要了一些模具鋼,做兩個試試,東西還沒到,不知道會不會好一點
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點評
當(dāng)時用的是哪兩種材料接觸?
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