qzcp 发表于 2013-5-21 06:40:06

ASTM A 47 Standard Specification for Ferritic Malleable Iron Castings

ASTM A 47  Standard Specification for Ferritic Malleable Iron Castings

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admin 发表于 2013-5-21 11:15:21

谢谢您的分享，金币已奖励，以后最好带上版本号
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