ygs67 发表于 2015-11-18 10:54:53

ASTM A939_A939M-15

ASTM A939_A939M-15 Standard Practice for Ultrasonic Examination from Bored Surfaces of Cylindrical Forgings

admin 发表于 2015-11-19 10:24:33


谢谢您的分享,金币已奖励!
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