· ics 77. 040. 10 h 23 gb/t 239.2—2012 gb/t 239—1999 metallic materials—wire—part 2 :...
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- · ICS 77. 040. 10 H 23 GB/T 239.2—2012 GB/T 239—1999 Metallic materials—Wire—Part 2 : Reverse torsion test (ISO 9649 : 1990 , Metallic materials—Wire—Reverse torsion
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