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GB/T3087-2008 ???? ?й????????????????ˉ?? ??????? GB/T5310 -2008???? ?й??????????????ˉ????????
ASME SA106-------??????ˉ??????????淶
ASME SA210 ???? ??????ˉ??????????淶
ASME SA213 ???? ??????ˉ??????????淶
DIN17175 ???? ????1????????????ˉ?????÷?Χ
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