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mechen 发表于 2015-4-28 08:51:08

ASTM E18-15 Standard Test Methods for Rockwell Hardness of Metallic Materials

ASTM E18-15  Standard Test Methods for Rockwell Hardness of Metallic Materials1,2

admin 发表于 2015-4-28 10:33:50

谢谢您的分享,金币已奖励!

nbjwbzj 发表于 2015-5-25 12:40:55

谢谢分享！！！！！！！

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