10188| 24
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45钢直接氮化处理防锈,耐磨性怎样,成本贵不贵? |
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点评
只作防锈用,可以深轻量级(1-2丝)就可以。表面灰不溜秋的。硬度HRC80以上你说怎么车?
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点评
耐磨有要求那最好在6-8丝。哪来亮白色
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