alldoing1 发表于 2018-5-17 13:05:02

ASTM B 49-1998（Repproved 2004) Standard Specification for Copper Rod Drawing

ASTM B 49-1998（Repproved 2004)  Standard Specification for Copper Rod Drawing Stock for Electrical Purposes
电气用铜棒拉制坯料的标准规范

admin 发表于 2018-5-17 16:59:04


谢谢您的分享，金币已奖励!
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