11014| 24
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45鋼直接氮化處理防銹,,耐磨性怎樣,,成本貴不貴? |
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點評
只作防銹用,,可以深輕量級(1-2絲)就可以。表面灰不溜秋的,。硬度HRC80以上你說怎么車,?
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點評
耐磨有要求那最好在6-8絲。哪來亮白色
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