Standard
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GB/T13793-1992,GB/T14291-2006, GB/T3091-1993,GB/T3092-1993,GB3640-88,BS1387/1985,ASTMA53/A36,EN39/EN10219,AP15L,GB/T9711,1-99 etc.
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Application
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Widely used in Structure, Accessorize,Construction, Fluidtransportation,
machinery parts,the stress parts of the automobiletractor parts and so on
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