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168-180-194*16-18-20-22-25-28-30-32-35-40 4850-5100-5400
219-245-273*16-18-20-22-25-28-30-32-35-40 4850-5100-5400
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1????????????GB/T8162-2008 2?????????????????GB/T8163-2008 3????ˉ????????GB3087-2008 4????ˉ?????????GB5310-2008??ST45.8-III??? 5???????豸??????????GB6479-2008 6?????????????????YB235-70 7????????????????YB528-65 8????????????????GB9948-2006 9?????????????????YB691-70 10??????????????????GB3088-1999 11??????????????GB5312-2008 12???????????????????GB3639-1999 13?????????16Mn??27SiMn??15CrMo??35CrMo??12CrMov??20G??40Cr,12Cr1MoV,15CrMo??
????????????GB/T17396-1998?????????????????????GB3093-1986???????????????????GB/T3639-1983????λ?????????????????GB/T3094-1986?????????????θ?????GB/T8713-1988????????????t??????????????GB13296-1991????ˉ??????????ò????????????GB/T14975-1994?????ò????????????GB/T14976-1994???????????ò??????????GB/T5035-1993???????????????????????API SPEC5CT-1999?????????淶?????
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