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| ?????????????????????????????????????????????????????????????????????????????????o??????????????????????????????????????? |   ???????? ????20#-10# ??б????GB/T8162-99 GB/T8163-1999 
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                      ?????????????????????????????????????????????????????????????????????????????????????????С???????????????????????????????????????????????????????????,??????????????20#??45#??16MN??Q345??A/B/C/D/E????27SIMN??15CrMO??12Cr1MOV??10CrMO910??304??304L??316??316L??321??P11??P22??P91??T91.??й???GB8162-99?????GB8163-99????????????ù?????????GB3087-99??GB5310-85????????ˉ?ù??GB5312-8???ù??... 
                      ???????????0510-88264321??88223334 ???棺0510-88223334 ?????18921237777 
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            | ???????2391  ??????2011/5/23 ?????????? ??????? | 
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