ygs67 发表于 2015-6-19 14:01:01

ASTM A409-A 409M-13

ASTM A409-A 409M-13 Standard Specification for Welded Large Diameter Austenitic Steel Pipe for Corrosive or High-Temperature Service

admin 发表于 2015-6-23 12:10:13

谢谢您的分享,金币已奖励!
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