ygs67 发表于 2015-12-28 10:27:22

ASTM E1901-13

ASTM E1901-13 Standard Guide for Detection and Evaluation of Discontinuities by Contact Pulse-Echo Straight-Beam Ultrasonic Methods

admin 发表于 2015-12-28 16:39:28

谢谢您的分享，金币已奖励!
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