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vily
等级:Senior
文章:647
积分:4865
门派:zhangjiagang
注册:2007-3-12 10:55:13 |
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 镀锌管理论重量计算公式
镀锌管每米重量=0.02466*壁厚*（外径-壁厚)*1.06
镀锌管也是钢材，表面镀了一层薄薄的锌，密度7.85kg/cm3 |
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