ygs67 发表于 2018-3-20 13:01:06

ASTM A508 A508M-18

ASTM A508 A508M-18 Standard Specification for Quenched and Tempered Vacuum-Treated Carbon and Alloy Steel Forgings for Pressure Vessels

admin 发表于 2018-3-21 16:22:01


谢谢您的分享，金币已奖励!
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