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????????????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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