松雨霞 发表于 2018-10-9 11:48:35

ASTM A249/A249M-18

Standard Specification for Welded Austenitic Steel Boiler, Superheater, Heat-Exchanger, and Condenser Tubes1

ygs67 发表于 2018-10-9 19:06:33

多谢分享！                          

admin 发表于 2018-10-12 20:12:55

谢谢您的分享，金币已奖励!
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